1
22 23 125 123 122 126 117 118 119 120 121 134 133 132 116 115 114 111 110 107 105 112 113 106 108 109 99 98 102 103 104 96 95 92 93 91 87 85 84 86 89 97 129 128 82 127 131 74 71 72 77 76 75 81 78 79 80 189 70 68 69 63 90 67 66 94 65 64 62 60 59 61 53 57 58 56 55 54 41 39 49 45 44 43 42 48 51 46 40 47 36 35 37 38 33 31 24 13 27 26 25 29 28 10 21 1 17 14 15 18 2 3 6 7 5 8 4 11 130 73 153 152 157 156 154 155 151 150 149 148 147 141 159 160 158 162 161 146 138 136 137 139 140 142 143 144 166 178 177 174 175 173 182 180 184 171 170 163 181 145 165 164 183 34 83 172 ? ? ? 5 15 12 10 13 16 10 10 10 12 14 11 11 12 10 8 11 9 13 6 14 19 15 35 12 18 6 10 10 9 14 8 12 19 14 12 13 9 7 13 17 16 18 10 8 16 8 16 7 14 24 8 12 7 30 8 9 13 11 8 10 JT Rps JT Rp T Rl T Rsa Jd DESCRIPTION OF MAP UNITS Diabase (Lower Jurassic) -- Fine-grained to aphanitic dikes (?) and sills and medium-grained, discordant, sheet-like intrusion of dark-gray to dark greenish-gray, sub-ophitic diabase; massive-textured, hard, and sparsely fractured. Composed dominantly of plagioclase, clinopyroxene, and opaque minerals. Olivine zone occurs aproximately 45 ft above the base of the sill. Finely laminated horizons occur in the upper third of the unit. Contacts are typically fine-grained, display chilled, sharp margins adjacent to intruded sedimentary rocks. Internal chilled horizons have been observed by Steiner and others (1992), Block and others (2004) and Block (2006). Thickness of the Palisades Sill diabase in the quadrangle is approximately 1,300 feet. Passaic Formation - (Lower Jurassic and Upper Triassic) (Olsen, 1980a) - Covered by surficial deposits and described from regional exposures and drill core examinations. Interbedded sequence of reddish-brown to maroon and purple, conglomerate, fine- to coarse-grained arkosic sandstone and less common, siltstone, shaly siltstone, silty mudstone and mudstone, and less common olive-gray, dark-gray, or black siltstone, silty mudstone, shale and lesser silty argillite. Regionally unit coarsens towards the north and northwest and fines towards the southwest. Unit dominated in mapped area by interbedded reddish-brown, fine- to coarse-grained arkosic sandstone, locally conglomeratic (JT Rps, identified from well logs, table 1), siltstone, and shaly siltstone. Reddish-brown arkosic sandstone and siltstone are thin- to medium-bedded, planar to cross-bedded, micaceous, and locally mudcracked and ripple cross-laminated. Root casts and load casts are common. Shaly siltstone, silty mudstone, and mudstone are fine-grained, very thin to thin-bedded, planar to ripple cross-laminated, locally fissile, bioturbated, and contain evaporite minerals. Less common unit (JT Rp, identified from well logs, table 1) contains siltstone, shaly siltstone, silty mudstone and mudstone. Reddish-brown siltstone is medium- to fine-grained, thin- to medium-bedded, planar to cross-bedded, micaceous, locally containing mud cracks, ripple cross-lamination, root casts and load casts. Shaly siltstone, silty mudstone, and mudstone form rhythmically fining upward sequences up to 15 feet thick. They are fine-grained, very-thin- to thin-bedded, planar to ripple cross-laminated, fissile, locally bioturbated, and locally contain evaporate minerals. Unit is approximately 11,000 feet thick in the map area. Lockatong Formation (Upper Triassic) (Kummel, 1898) - Cyclically deposited sequences of mainly gray to greenish-gray, siltstone and white to buff arkosic sandstone and local pebble conglomerate. Siltstone is medium- to fine-grained, thin-bedded, laminated, platy to massive. Arkose (T Rla) has affinities for the Stockton Formation and is massive to cross-bedded. Symmetrical crossbedding that indicates bi-directional flow only found here and not in the Stockton. Occurs in the middle to upper section of cycles. Thermally altered to dark gray to black hornfels (T Rlh) consisting of plagioclase, orthoclase and recrystallized diopside-rich arkose and calc-silicate minerals such as grossularite, diopside and prehnite in siltstone beds and biotite and albite in finer grained beds (Olsen 1980c, Van Houten, 1969). Arkosic units show a less penetrative degree of hornfels (T Rlah). Lower contact gradational into Stockton Formation and placed at base of lowest continuous black siltstone bed (Olsen, 1980c). Maximum thickness of unit regionally is about 700 feet (Parker, 1993). Stockton Formation (Upper Triassic) (Kummel, 1898) - Unit is interbedded sequence of gray, grayish-brown, or slightly reddish-brown, medium- to fine-grained, thin- to thick-bedded, poorly sorted, to clast imbricated conglomerate, planar to trough cross-bedded, and ripple-cross laminated arkosic sandstone, and reddish-brown clayey fine-grained, sandstone, siltstone and mudstone. Sedimentary structures indicate uni-directional flow Coarser units commonly occur as lenses and are locally graded; finer units are bioturbated. Cycles are fining upwards. Conglomerate and sandstone units are deeply weathered and more common in the lower half; siltstone and mudstone are generally less weathered and more common in upper half. Upper section of unit is thermally metamorphosed (T Rsah) where in contact with Palisades Sill. Lower contact, not exposed is regionally an erosional unconformity. Thickness is approximately 750 feet based on Olsen and others (2004). Mixed metamorphic units (Ordovician to Proterozoic) of the Piedmont - used only in cross section ? ? U D ? ? EXPLANATION OF MAP SYMBOLS Contact - Dashed where approximately located; queried where uncertain; dotted where concealed Fault - U, upthrown side; D, downthrown side. Ball and post indicates direction of dip Dashed where approximately located; queried where uncertain; dotted where concealed Arrows show relative motion Motion is unknown Folds Anticline - showing trace of axial surface, direction and dip of limbs, and direction of plunge. Syncline - showing trace of axial surface, direction and dip of limbs, and direction of plunge. Planar features Strike and dip of inclined beds Strike and dip of foliation in igneous rocks Other features Abandoned rock quarry Field station in diabase Location of well used in lithologic correlation. Well number correlates to well table 11 9 T Rla INTRODUCTION The Yonkers and Nyack, NY-NJ 7 1/2-minute quadrangles are continuous and parallel to the south-flowing Hudson River. The quadrangles occupy the northeastern corner of New Jersey. The Palisades is the dominant topographic feature; its sheer cliffs extend from sea level at the Hudson River up to 550 ft at the top of the ridge. In contrast a gently trending slope marks the western side of the Palisades. Secondary topographic features parallel the trend of the Palisades but only reach 160 ft. in elevation. A suburban-urban landscape dominates the New Jersey side except for some limited parkland. Palisades Interstate Park, extending along the crest and the eastern slope of the Palisades and the several small local and state parklands and the Alpine Scout Camp, are some of the few remaining open islands of land amongst suburban housing tracts. Development density increases towards the south. STRATIGRAPHY The bedrock consists of sedimentary and plutonic formations of Mesozoic age in the Newark Basin, a rift basin formed during the breakup of the supercontinent Pangaea. The Newark Basin is a half-graben, bounded on the northwest by a series of northeast-striking, southeast-dipping border faults. Sequential fault movement from Late Triassic to Middle Jurassic time along back-stepping normal faults along the northwestern margin controlled basin morphology, and thereby, sediment-depositional patterns within the basin (Schlische, 1992, Olsen and others, 1996). Schlische (1992, 1993) suggested that movement along several major intrabasinal faults in the central part of the basin controlled depositional centers, as shown by regional sedimentary thickness patterns. Deformation and synchronous sedimentation continued into the Middle Jurassic when extensional faulting ceased. Compressional stresses began with the opening of the Atlantic Ocean. Most tectonic deformation is probably of Late Triassic to Middle Jurassic age (Lucas and others, 1988; de Boer and Clifford, 1988). Episodic, periodic motion on these faults increased the sediment input into the basin from a northern and a western Highlands source, as well as a southeastern one. A strong basin-parallel sedimentation trend exhibiting a northern provenance filled the northeastern margin of the Newark Basin. Other Highland-based fluvial sediments entered the basin along rider blocks between the backstepping boundary faults. Several pulses of mafic magma intruded the basin sediments and reached the paleosurface regionally to form thick basalt volcanics. All magmatic activity took place during the Early Jurassic. The Newark Basin has continued to erode and has supplied sediment to the Atlantic coastal region (Poag and Sevon, 1989; Pazzaglia, 1993). A mantle of glacial and postglacial deposits of probable Illinoisan to late Wisconsinan age overlies the Mesozoic bedrock throughout the area (Stanford, 2002). Glaciers polished and striated the resistant diabase of the Palisades while glacial sediments blanketed the less resistant Mesozoic sedimentary rocks, thereby limiting their exposure to small streams draining the western slope of the ridge. The diabase of the Palisades ridge forms a steeply dipping eastern cliff face. Its contact with the underlying sediments is exposed locally along the cliff base except where covered by talus from the cliffs. Parker and others (1988) and Parker (1993) subdivided the Passaic Formation along the northern Newark Basin into several facies in a coarsening-upwards and along-strike succession from southwest to north-northwest. A near-source conglomerate-to-sandstone sequence at the northern edge of the basin grades southward into more distal, finer, mudstone-dominated beds. They mapped a sandstone and minor siltstone facies underlying the western mapped area. Surficial material blankets the Passaic except at a single possible outcrop of pebble conglomerate in a coarse-grained, poorly sorted matrix that lies at the high school in Demarest, N.J. Well log and core data supply sufficient information on the Passaic to divide it into two facies. Core samples are dominated by a coarse-grained arkosic sandstone and interbedded fine-to-medium-grained sandstone. Driller’s logs (table 1) are not detailed enough to clearly define the Passaic facies throughout the area. Mapping suggests that the conglomerate and sandstone facies continues farther to the east, closer to the Lockatong arkosic facies than previously mapped by Parker and others (1988) and Parker (1993). The Passaic may become finer southwestward along strike but is mapped here as a single unit. The Lockatong along the Palisades occurs in two facies, an upper, coarser-grained arkosic-to-feldspathic sandstone, and a lower, black siltstone interbedded with a medium-to-coarse-grained, arkosic-to-feldspathic sandstone (Parker, 1993; Drake and others, 1996). Parker and others (1988) placed the upper arkosic facies in the Stockton Formation and classified only the siltstone/argillite sedimentary rocks as Lockatong. They suggested that the Lockatong thinned to the northeast and was replaced by the Stockton. Olsen, (1980a, 1980b, 1980c) and Olsen and others (1989) mapped the Lockatong as a single lithologic unit and described its fining-upwards cyclicity. They described the Lockatong along the Palisades as a coarser-grained basal unit composed of medium- to coarse-grained arkosic sandstone overlain by a thin siltstone unit. These cycles are correlated throughout the Newark Basin as the dominant grain size fines from coarse sand to siltstone (Olsen, 1980b, 1980c, Olsen and others, 1989, 1996, 2004). The Lockatong is a siltstone in the central part of the Newark Basin except where it occurs close to rider blocks (Drake and others, 1996). Here the sedimentary rocks are conglomeritic because they are closer to their source. Beds mapped as Lockatong within the study area contain cycles of a basal medium-to-coarse-grained arkosic sandstone and less-well-defined quartz sandstone overlain by a thin dark gray siltstone, separated by interbedded dark-gray argillite in the Lockatong. However the arkosic sandstone mapped here lacks exposed gray siltstone interbeds. The Lockatong lenses into the Passaic or Stockton along the northern edge of the Newark Basin (Olsen, 1980b, 1980c). The dstinction between the Lockatong and Stockton here is based on the work of Olsen and others (2004). Sedimentary structures distinguish the lacustrine Lockatong from the fluvial environments of the Stockton (Paul Olsen, oral communication, 2008). Volkert and others (1996) mapped Proterozoic to Paleozoic metamorphic rocks cropping out along the Hoboken waterfront. These units form the basement for the Stockton sedimentary beds and, though not exposed in the study area are believed to continue northward under the Hudson River and across the Yonkers quadrangle. Olsen and others (2004) drew the contact between the Mesozoic sedimentary and older metamorphic rocks near the midchannel of the Hudson River. PALISADES SILL The rocks of the Palisades Sill dominate all the bedrock exposures. They form the northern end of a semicontinuous intrusive sheet, broken by faults, and covered locally by coastal plain deposits, that extends across central New Jersey and correlates with the Gettysburg Sill of Pennsylvania (Dunning and Hodych, 1990; Husch, 1990). Dunning and Hodych (1990) used zircons and baddeleyites to calculate a mean U/Pb age of nine samples as 200.9+ 1.0 Ma. The Palisades is part of the extensive Central Atlantic Magmatic Pulse (CAMP) that includes igneous units in South America, Africa and Europe (Marzoli and others, 1999). These deposits mark the initial stages of the breakup of the supercontinent Pangaea. The Palisades is a high-titanium quartz-normative tholeiite (Husch, 1990; Gorring and Naslund, 1995; Dickson, 2006) that varies to a fine-grained diabase and gabbro (Olsen and others, 2004). Olivine is a dominant mineral in a layer approximately 15 m above the base of the sill (Lewis, 1908; Husch, 1990; Gorring and Naslund, 1995). Block and others (2004) described this zone as occurring higher in the Palisades sill towards the north. The Palisades Sill has continued to be the subject of much scientific study as new field and geochemical studies have prompted diverse modes of origin. Initial work suggested that the sill formed from a single magmatic pulse that underwent fractional crystallization and crystal settling (Lewis, 1908; Walker, 1940; Pearce, 1969). More recent workers have suggested that the Palisades consists of two (Walker, 1969), three (Block and others, 2004; Block, 2006) to potentially four individual magmatic pulses (Shirley, 1987; Steiner and others, 1992). Compaction of the crystalline magma accounts for some of the mineral banding in the upper section of the sill (Steiner and others, 1992; Block and others, 2004; Block, 2006). Philpotts and Dickson (2002) and Dickson (2006) attributed a light-dark microbanding of plagioclase-pyroxene clusters to crystallization near the roof of the sill that subsequently sank into the remaining melt. Block and others (2004) and Block (2006) proposed that the multiple magmatic pulses can be correlated to the basalt formations cropping out farther west in central New Jersey. STRUCTURE Lewis (1908) noted dominant joint trends of 0 o , 20 o and 45 o that are perpendicular to the upper and lower contact surfaces. These joints dip gently westward parallel to contacts with hornfels. South of the study area, north-south-trending crushed zones as much as four feet wide repeat across the outcrop as shear zones (Lewis, 1908). He indicated that displacement may extend hundreds of feet along these wide zones. The location of a deep ravine has been used to delineate a fault extending north-south along the west side of the Palisade ridge which would project into the study area (Kummel, 1898; Darton, 1902; Parker, 1993; Drake and others, 1996). However no evidence of this fault has been found in this study. This sediment-diabase contact has been interpreted instead as an igneous contact. It marks where the magma migrated upsection into younger beds. Along strike two other small diabase bodies occur in the Lockatong arkosic facies above the main Palisades body in Alpine with no evidence of faulting. Burgdorff and Goldberg (2001), Goldberg and Burgdorff (2005) and Matter and others (2006) record diabase stringers intruding the Lockatong sedimentary beds below the lower contact of the main Palisades sill. A similar stringer intrusion occurs near the upper contact between the Palisades and the Lockatong in Rockleigh, NJ. Burgdorff and Goldberg (2001) and Matter and others (2006) studied fracture trends in two wells drilled into the diabase along the Palisades directly across the state line, in New York. These wells penetrated 620 ft and 750 ft of diabase respectively and 125 ft and 250 ft of the underlying hornfels respectively. Both holes were geophysically logged and fracture data were collected using a borehole televiewer logger. Vertical fractures showed dominant trends striking 41 o , 88 o , 93 o and 103 o (Burgdorff and Goldberg, 2001). Horizontal fractures were abundant near the lower contact of the diabase. Diabase fractures mapped in the area vary widely in strike from 10 o to 50 o , a weaker trend strikes 100 o to 120 o (fig. 1). These trends broadly correspond to those of Lewis (1908), Burgdorff and Goldberg (2001), and Matter and others (2006) except for the dominant E-W trend observed in the downhole logs but not mapped in the surface. Fractures in the Stockton trend 0 o -20 o whereas in the Lockatong they trend 30 o -40 o (fig. 1). Husch, J.M., 1990, Palisades sill: origin of the olivine zone by separate magmatic injection rather than gravity settling, Geology, v.18, p.699-702. Kummel, H.B., 1897, The Newark system, report of progress, New Jersey Geological Survey, Annual report of the State Geologist 1896, p.27-88. Kummel, H.B., 1898, The Newark system or red sandstone belt, New Jersey Geological Survey, Annual report of the State Geologist 1897, p.23-164. Latypov, R., 2003, The origin of basic-ultrabasic sills with S-, D- and I-shaped compositional profiles by in situ crystallization of a simple input of phenocryst-poor parental magma, Journal of Petrology, v.44, p.1619-1656. Lewis, J.V., 1908, Petrography of the Newark igneous rocks of New Jersey, New Jersey Geological Survey Annual Report of the State Geologist 1907, p.97-167. Lucas, M., Hull, J., and Manspeizer, W., 1988, A foreland-type fold and related structures in the Newark Rift Basin, in, Manspeizer, W., ed., Triassic-Jurassic rifting, continental breakup and the origin of the Atlantic Ocean and passive margins, part A., Elsevier Science Publishers, New York, p.307-332. Marzoli, A., Renne, P.R., Piccirillo, E.M., Ernesto, M., Bellieni, G., and De Min, A., 1999, Extensive 200-million-year-old continental flood basalts of the Central Atlantic Magmatic Province, Science, v.284, p.616-618. Matter, J.M., Goldberg, D.S., and Morin, R.H., 2006, Contact zone permeability at intrusion boundaries: new results from hydraulic testing and geophysical logging in the Newark Rift Basin, New York, USA, Hydrogeology Journal, v.16, p.689-69. Olsen, P.E., 1980a, The latest Triassic and Early Jurassic formations of the Newark basin (eastern North America, Newark Supergroup): Stratigraphy, structure, and correlation: New Jersey Academy of Science Bulletin, v. 25, p. 25-51. Olsen, P.E., 1980b, Triassic and Jurassic formations of the Newark basin, in, Manspeizer, Warren, ed., Field studies of New Jersey Geology and guide to field trips: 52nd Annual Meeting of the New York State Geological Association, p. 2-41. Olsen, P.E., 1980c, Fossil great lakes of the Newark Supergroup in New Jersey, in, Manspeizer, Warren, ed., Field studies of New Jersey Geology and guide to field trips: 52nd Annual Meeting of the New York State Geological Association, p. 352-398. Olsen, P.E. Kent, D.V., and Whiteside, J.H., 2004, The Newark Basin, the Central Atlantic Magmatic Province and the Triassic-Jurassic boundary, A field trip, run on May 23, 2004, in conjunction with the 8th Annual DOSECC Workshop on Continental Scientific Drilling May 22-25, 2004, Rutgers University, New Brunswick, New Jersey, 45p. Olsen, P.E., Kent, D.V., Cornet, B., Witte, W.K., and Schlische, R.W., 1996, High-resolution stratigraphy of the Newark rift basin (early Mesozoic, eastern North America): Geological Society of America, Bulletin, v.108, p. 40-77. Olsen, P. E., Schlische, R. W., Gore, P. J. W., and others, 1989, Field guide to the tectonics, stratigraphy, sedimentology, and paleontology of the Newark Supergroup, eastern North America. International Geological Congress, Guidebooks for Field Trips T351, 174p. Parker, R.A.,1993, Stratigraphic relations of the sedimentary rocks below the Lower Jurassic Orange Mountain Basalt, northern Newark Basin, New Jersey and New York: U.S.G.S. Miscellaneous Field Studies, MF-2208, scale 1:100,000. Parker, R.A., Houghton, H.F., and McDowell, R.C., 1988, Stratigraphic framework and distribution of Early Mesozoic rocks of the northern Newark Basin, New Jersey and New York: in, Froelich, A.J., and Robinson, G.R., Jr., eds, Studies of the Early Mesozoic Basins in the eastern United States, U.S. Geological Survey Bulletin 1776, p.31-39. Pazzaglia, F.J., 1993. Stratigraphy, petrography, and correlation of late Cenozoic middle Atlantic Coastal Plain deposits: implications for late-stage passive-margin geologic evolution, Geological Society of America Bulletin, 105, p.1617-1634. Pearce, TH., 1969, Chemical variations in the Palisade sill, Journal of Petrology, v.11, p.15-32. Philpotts, A.R., and Dickson, L.D., 2002, Millimeter-scale modal layering and the nature of the upper solidification zone in thick flood-basalt flows and other sheets of magma, Journal of Structural Geology, v. 24, p.1171-1177. Poag, C.W., and Sevon, W.D., 1989. A record of Appalachian denudation in postrift Mesozoic and Cenozoic sedimentary deposits of the U.S. middle Atlantic continental margin, Geomorphology, v.2, p.119-157. Schlische, R.W., 1992, Structural and stratigraphic development of the Newark extensional basin, eastern North America: Evidence for the growth of the basin and its bounding structures; Geological Society of America Bulletin, v. 104, p.1246-1263. Schlische, R.W., 1993, Anatomy and evolution of the Triassic-Jurassic continental rift system, eastern North America; Tectonics, v.12, p.1026-1042. Shirley, D.N., 1987, Differentiation and compaction in the Palisades Sill, New Jersey, Journal of Petrology, v.28, p.835-865. Stanford, S.D., 2002, Surficial geology of the Yonkers and Nyack quadrangles, Bergen County, New Jersey, New Jersey Geological Survey Open-File Map, OFM-50, scale 1:24,000. Steiner, J.C., Walker, R.J., Warner, R.D., and Olson, T.R., 1992, A cumulus-transport-deposition model for the differentiation of the Palisades sill, Geological Society of America Special Paper 268, p.193-217. Van Houten, F.B., 1969, Late Triassic Newark Group, north central New Jersey and adjacent Pennsylvania and New York; in, Subitzky, S., ed., Geology of selected area in New Jersey and eastern Pennsylvania and guidebook of excursions; Rutgers University Press, New Brunswick, New Jersey, p. 314-347. Van Houten, F.B., 1980, Late Triassic part of Newark Supergroup, Delaware River section, west-central New Jersey; in, Manspeizer, Warren, ed., Field studies of New Jersey geology and guide to field trips: 52nd Annual Meeting of the New York State Geological Association, p. 264-276. Volkert, R.A., Drake, A.A., Jr., and Sugarman, P.J., 1996, Geology, geochemistry, and tectonostratigraphic relations of the crystalline basement beneath the Coastal Plain of New Jersey and contiguous areas, U.S. Geological Survey Professional Paper 1565-B, 48p. Walker, F., 1940, The differentiation of the Palisades diabase, New Jersey, Geological Society of America, Bulletin v.51, p.1059-1106. Walker, K.R., 1969, The Palisades sill, New Jersey: a re-investigation, Geological Society of America, Special Paper 111, 178p. 7000 FEET 1000 1000 0 2000 3000 4000 5000 6000 .5 1 KILOMETER 1 0 SCALE 1:24 000 2 1 0 1 MILE LOCATION IN NEW JERSEY Bedrock Geologic Map of the Yonkers and Nyack Quadrangles, Bergen County, New Jersey By Donald H. Monteverde 2011 Bedrock geology mapped by D.H. Monteverde in 2007-2008 Digital cartography by D.H. Monteverde Research supported by U.S. Geological Survey, National Cooperative Geologic Mapping Program, under USGS award number 05HQAG0026. The views and conclusions in this document are those of the author and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government. 1 83 5 CONTOUR INTERVAL 20 FEET National Geodetic Vertical Datum of 1929 Photorevised 1981 (WEEHAWKEN) MAGNETIC NORTH APPROXIMATE MEAN DECLINATION, 1981 TRUE NORTH 12 / 1 2 o DEPARTMENT OF ENVIRONMENTAL PROTECTION WATER RESOURCE MANAGEMENT NEW JERSEY GEOLOGICAL SURVEY Prepared in cooperation with the U.S. GEOLOGICAL SURVEY NATIONAL GEOLOGIC MAPPING PROGRAM BEDROCK GEOLOGIC MAP OF THE YONKERS AND NYACK QUADRANGLES, BERGEN COUNTY, NEW JERSEY GEOLOGIC MAP SERIES GMS 11-1 OYu Table 1.--Selected Well and Boring Logs Well Identifier 1 Driller’s Log No. -------------------------------------------------- Depth 2 Description 3 ------------------------------------------------------------------------------ 1 26-6059 0-8 dirt 8-250 red shale ------------------------------------------------------------------------------ 2 26-828 0-71 surficial 71-180 sandstone in all colors 180-200 trap ------------------------------------------------------------------------------ 3 26-2237 0-115 surficial 115-298 soft red rock ------------------------------------------------------------------------------ 4 26-4066 0-57 surficial 57-300 red rock ------------------------------------------------------------------------------ 5 26-4421 0-120 surficial 120-324 red rock ------------------------------------------------------------------------------ 6 26-4422 0-120 surficial 120-450 red rock ------------------------------------------------------------------------------ 7 26-810 0-99 surficial 99-380 pale red sandstone 380-410 gray argillite + sandstone 410-470 light gray sandstone + trap fragments ------------------------------------------------------------------------------ 8 26-4328 0-120 surficial 120-356 red rock ------------------------------------------------------------------------------ 10 26-461 0-55 surficial 55-250 red shale 250-400 sand rock 400-410 trap ------------------------------------------------------------------------------ 11 26-2781 0-46 surficial 46-396 red rock ------------------------------------------------------------------------------ 12 26-4357 0-35 surficial 35-370 sandstone and trap ------------------------------------------------------------------------------ 13 26-791 0-135 surficial 135-354 sandstone ------------------------------------------------------------------------------ 14 26-6111 0-146 surficial 146-242 sandstone ------------------------------------------------------------------------------ 15 26-7000 0-121 surficial at 121 red shale ------------------------------------------------------------------------------ 17 26-2427 0-140 surficial 140-380 shale ------------------------------------------------------------------------------ 18 26-6142 0-155 surficial 155-300 red rock ------------------------------------------------------------------------------ 21 26-3519 0-20 surficial 20-345 trap rock ------------------------------------------------------------------------------ 22 26-3430 0-18 surficial 18-570 trap rock ----------------------------------------------------------------------------- 23 26-4043 0-18 surficial 18-265 trap rock ------------------------------------------------------------------------------ 24 26-4716 0-151 surficial 151-202 red shale ------------------------------------------------------------------------------ 25 26-2436 0-30 surficial 30-300 sandstone ------------------------------------------------------------------------------ 26 26-4489 0-22 surficial 22-300 red rock ------------------------------------------------------------------------------ 27 26-4217 0-50 red shale 50-230 sandstone ------------------------------------------------------------------------------ 28 26-5079 0-21 surficial 21-200 red rock ------------------------------------------------------------------------------ 29 26-785 0-76 surficial 76-158 red rock ------------------------------------------------------------------------------ 31 26-3429 0-20 surficial 20-161 red rock ------------------------------------------------------------------------------ 33 26-4752 0-25 surficial 25-70 red shale ------------------------------------------------------------------------------ 34 26-3853 0-27 surficial 27-200 sandstone and shale ledges ------------------------------------------------------------------------------ 35 26-3271 0-15 surficial 15-198 shale ------------------------------------------------------------------------------ 36 26-145 0-20 surficial 20-200 red rock ------------------------------------------------------------------------------ 37 26-3730 0-20 surficial 20-25 soft red shale 25-230 red sandstone ------------------------------------------------------------------------------ 38 26-3491 0-24 surficial 24-96 red rock ------------------------------------------------------------------------------ 39 26-3898 0-47 surficial 47-96 white and purple sandstone ------------------------------------------------------------------------------ 40 26-3691 0-21 surficial 21-210 trap rock 210-235 red or pink trap rock ------------------------------------------------------------------------------ 41 26-1357 0-29 surficial 29-176 conglomerate 176-180 dark gray trap rock ------------------------------------------------------------------------------ 42 26-1798 0-52 surficial 52-202 red rock ------------------------------------------------------------------------------ 43 26-1615 0-19 surficial 19-100 sand rock ------------------------------------------------------------------------------ 44 26-4394 0-28 surficial 28-107 red sandstone ------------------------------------------------------------------------------ 45 26-2787 0-38 surficial 38-107 red sandstone ------------------------------------------------------------------------------ 46 26-4103 0-73 surficial 73-145 red sandstone ------------------------------------------------------------------------------ 47 26-3825 0-12 surficial 12-38 shale 38-125 red rock + sandstone mixed ------------------------------------------------------------------------------ 48 26-663 0-37 surficial 37-50 brown stone ------------------------------------------------------------------------------ 49 26-1169 0-20 surficial 20-75 red rock ------------------------------------------------------------------------------ 51 26-533 0-74 surficial 74-125 red sandstone ------------------------------------------------------------------------------ 53 26-4336 0-30 surficial 30-165 trap rock, some reddish fine sandstone ------------------------------------------------------------------------------ 54 26-3492 0-10 surficial 10-97 trap rock ------------------------------------------------------------------------------ 55 26-5817 0-8 surficial 8-740 granitic rock (diabase) 740-1000 red shale ------------------------------------------------------------------------------ 56 23-8340 0-15 surficial 15-243 trap rock 243-367 red shale ------------------------------------------------------------------------------ 57 23-8314 0-40 surficial 40-800 trap rock ------------------------------------------------------------------------------ 58 23-463 0-31 surficial 31-68 sandstone ------------------------------------------------------------------------------ 59 23-2348 0-72 surficial 72-276 sandstone ------------------------------------------------------------------------------ 60 23-2273 0-72 surficial 72-279 sandstone ------------------------------------------------------------------------------ 61 23-5056 0-76 surficial 76-164 red sandstone ------------------------------------------------------------------------------ 62 23-4388 0-21 surficial 21-185 red rock ------------------------------------------------------------------------------ 63 23-4533 0-21 surficial 21-170 red sandstone ------------------------------------------------------------------------------ 64 23-7583 0-14 surficial at 14 shale ------------------------------------------------------------------------------ 65 23-4657 0-16 surficial 16-150 red sandstone ------------------------------------------------------------------------------ 66 23-7108 0-12 surficial 12-114 red sandstone ------------------------------------------------------------------------------ 67 23-7404 0-34 surficial 34-50 shale ------------------------------------------------------------------------------ 68 23-7190 0-30 surficial 30-150 red shale ------------------------------------------------------------------------------ 69 23-7174 0-30 surficial 30-159 red shale ------------------------------------------------------------------------------ 70 23-8956 0-85 surficial 85-118 sandstone ------------------------------------------------------------------------------ 71 23-4597 0-93 surficial 93-200 red rock ------------------------------------------------------------------------------ 72 23-4232 0-10 surficial 10-670 trap rock ------------------------------------------------------------------------------ 73 23-7743 0-3 surficial 3-1085 granite (diabase) ------------------------------------------------------------------------------ 74 23-6889 0-40 surficial 40-200 shale + sandstone ------------------------------------------------------------------------------ 75 23-4637 0-24 surficial 24-110 white rock 110-137 trap ------------------------------------------------------------------------------ 76 23-4424 0-34 surficial 34-150 red + white sandstone ------------------------------------------------------------------------------ 77 23-5397 0-69 surficial 69-160 red sandstone ------------------------------------------------------------------------------ 78 23-4596 0-3 surficial 3-15 shale 15-125 brown sandstone 125-200 red rock ------------------------------------------------------------------------------ 79 23-4801 0-30 surficial 30-165 red sandstone ------------------------------------------------------------------------------ 80 23-6344 0-50 surficial 50-167 red rock ------------------------------------------------------------------------------ 81 23-4259 0-45 surficial 45-150 red rock ------------------------------------------------------------------------------ 82 23-7586 0-28 surficial 28-170 red sandstone ------------------------------------------------------------------------------ 83 BWA files 0-101 surficial 23-44-536 101-142 red shale ------------------------------------------------------------------------------ 84 23-1139 0-26 surficial 26-106 red sandstone ------------------------------------------------------------------------------ 85 23-1138 0-26 surficial 26-109 red sandstone ------------------------------------------------------------------------------ 86 23-1117 0-35 surficial 35-106 red sandstone ------------------------------------------------------------------------------ 87 23-6255 0-18 surficial 18-150 red rock ------------------------------------------------------------------------------ 89 23-7279 0-76 surficial 76-90 red shale 90-160 brown fine sandstone 160-386 brown shale ------------------------------------------------------------------------------ 90 23-6475 0-40 surficial 40-90 red sandstone ------------------------------------------------------------------------------ 91 23-4570 0-17 surficial 17-125 red rock ------------------------------------------------------------------------------ 92 23-4876 0-41 surficial 41-200 red sandstone ------------------------------------------------------------------------------ 93 23-5631 0-16 surficial 16-185 red sandstone ------------------------------------------------------------------------------ 94 23-4409 0-30 surficial 30-185 sandstone + red shale ------------------------------------------------------------------------------ 95 23-499 0-44 surficial 44-100 red rock ------------------------------------------------------------------------------ 96 23-8200 0-44 surficial 44-150 red sandstone ------------------------------------------------------------------------------ 97 23-1302 0-72 surficial 72-75 red rock ------------------------------------------------------------------------------ 98 23-1184 0-84 surficial 84-88 brown sandstone 88-95 red shale ------------------------------------------------------------------------------ 99 23-1981 0-85 surficial 85-90 red sandstone ------------------------------------------------------------------------------ 102 23-1260 0-82 surficial 82-96 dusky red micaceous sandstone ------------------------------------------------------------------------------ 103 23-1451 0-79 gray surficial 79-89 red sandstone ------------------------------------------------------------------------------ 104 23-1971 0-102 surficial 102-106 red rock ------------------------------------------------------------------------------ 105 23-7381 0-12 surficial 12-120 red sandstone ------------------------------------------------------------------------------ 106 23-4442 0-88 surficial 88-475 sandstone ------------------------------------------------------------------------------ 107 23-6058 0-43 backfill 43-175 red sandstone ------------------------------------------------------------------------------ 108 23-7908 0-50 surficial 50-120 red shale ------------------------------------------------------------------------------ 109 23-878 0-38 surficial 38-122 red sandstone ------------------------------------------------------------------------------ 110 23-4446 0-34 surficial 34-50 red rock ------------------------------------------------------------------------------ 111 23-5838 0-20 surficial 20-348 red rock ------------------------------------------------------------------------------ 112 23-5940 0-33 surficial 33-346 red rock ------------------------------------------------------------------------------ 113 23-5939 0-11 surficial 11-33 red shale 33-348 red rock ------------------------------------------------------------------------------ 114 23-6267 0-81 surficial 81-252 sandstone ------------------------------------------------------------------------------ 115 23-6345 0-49 surficial 49-171 red rock ------------------------------------------------------------------------------ 116 23-4284 0-76 surficial 76-167 red rock ------------------------------------------------------------------------------ 117 23-838 0-55 surficial 55-268 red sandstone ------------------------------------------------------------------------------ 118 23-2471 0-52 surficial 52-150 red sandstone ------------------------------------------------------------------------------ 119 23-1664 0-33 surficial 33-35 rock, soft sandstone 35-54 rock, hard sandstone ------------------------------------------------------------------------------ 120 23-1672 0-138 surficial 138-401 red, brown shale + sandstone ------------------------------------------------------------------------------ 121 23-5133 0-61 surficial 61-500 red shale ------------------------------------------------------------------------------ 122 23-4196 0-36 surficial 36-248 red rock ------------------------------------------------------------------------------ 123 23-3807 0-27 surficial 27-300 red rock + shales ------------------------------------------------------------------------------ 125 23-2906 0-33 surficial 33-114 sandstone ------------------------------------------------------------------------------ 126 23-4674 0-51 surficial 51-142 red rock ------------------------------------------------------------------------------ 127 23-6320 0-38 surficial 38-102 soft red sandstone ------------------------------------------------------------------------------ 128 23-2099 0-40 surficial 40-85 red rock ------------------------------------------------------------------------------ 129 23-8004 0-5 surficial 5-36 red rock 36-205 red sandstone ------------------------------------------------------------------------------ 130 23-501 0-34 surficial 34-110 red sandstone ------------------------------------------------------------------------------ 131 23-5977 0-25 surficial 25-31 white sandstone, coarse 31-150 white + red sandstone at 150 trap rock ------------------------------------------------------------------------------ 132 23-4689 0-38 surficial 38-100 white sandstone 100-140 trap with white sandstone ------------------------------------------------------------------------------ 133 23-6767 0-3 surficial 3-1205 trap rock ------------------------------------------------------------------------------ 134 N23-44-322 0-47 surficial 47-594 red sandstone ------------------------------------------------------------------------------ 136 23-5860 0-30 surficial 30-35 soft red shale 35-53 soft red sandstone 53-120 hard red sandstone ------------------------------------------------------------------------------ 137 23-7297 0-60 surficial 60-125 red sandstone ------------------------------------------------------------------------------ 138 23-7335 0-96 surficial 96-174 red shale with some streaks of sandstone ------------------------------------------------------------------------------ 139 23-7844 0-45 surficial 45-68 red shale 68-205 sandstone + shale ------------------------------------------------------------------------------ 140 23-1063 0-76 surficial 76-102 red sandstone ------------------------------------------------------------------------------ 141 23-6873 0-63 surficial 63-200 argillite ------------------------------------------------------------------------------ 142 23-6818 0-73 surficial 73-130 red sandstone ------------------------------------------------------------------------------ 143 23-971 0-33 surficial 33-82 red rock ------------------------------------------------------------------------------ 144 23-5521 0-26 surficial 26-145 red sandstone ------------------------------------------------------------------------------ 145 23-1446 0-24 surficial 24-75 red sandstone ------------------------------------------------------------------------------ 146 23-4108 0-43 surficial 43-364 shale + sand rock ------------------------------------------------------------------------------ 147 23-1497 0-24 surficial 24-65 hard red sandstone 65-102 red shale ------------------------------------------------------------------------------ 148 23-7788 0-50 surficial 50-160 red rock ------------------------------------------------------------------------------ 149 23-3127 0-35 surficial 35-100 red sandstone ------------------------------------------------------------------------------ 150 23-5228 0-28 surficial 28-500 red shale + sandstone ------------------------------------------------------------------------------ 151 23-5590 0-30 surficial 30-50 shale 50-250 red rock ------------------------------------------------------------------------------ 152 23-5879 0-33 surficial 33-125 red sandstone ------------------------------------------------------------------------------ 153 23-3034 0-9 surficial 9-37 soft red shale 37-130 hard red shale ------------------------------------------------------------------------------ 154 23-6831 0-51 surficial 51-200 red rock ------------------------------------------------------------------------------ 155 23-927 0-36 surficial 36-72 red sandstone ------------------------------------------------------------------------------ 156 23-7828 0-30 surficial 30-102 red shale ------------------------------------------------------------------------------ 157 23-6642 0-19 surficial 19-96 red shale, red sandstone ------------------------------------------------------------------------------ 158 23-4795 0-59 surficial 59-200 red sandstone ------------------------------------------------------------------------------ 159 23-5520 0-25 surficial 25-145 red sandstone ------------------------------------------------------------------------------ 160 23-7662 0-8 red hardpan 8-180 red sandstone ------------------------------------------------------------------------------ 161 23-7107 0-48 surficial 48-107 red sandstone ------------------------------------------------------------------------------ 162 23-7099 0-54 surficial 54-120 red sandstone ------------------------------------------------------------------------------ 163 23-153 0-88 surficial 88-185 red rock ------------------------------------------------------------------------------ 164 23-4248 0-45 surficial 45-210 red rock ------------------------------------------------------------------------------ 165 23-4250 0-45 surficial 45-210 red rock ------------------------------------------------------------------------------ 166 23-3259 0-36 surficial 36-171 red rock ------------------------------------------------------------------------------ 170 23-6186 0-60 surficial 60-530 red rock ------------------------------------------------------------------------------ 171 23-6016 0-65 surficial 65-500 red rock ------------------------------------------------------------------------------ 172 23-4318 0-62 surficial 62-150 red rock ------------------------------------------------------------------------------ 173 23-4285 0-90 surficial 90-450 red rock ------------------------------------------------------------------------------ 174 23-321 0-70 surficial 70-145 red shale ------------------------------------------------------------------------------ 175 23-300 0-76 surficial 76-150 red shale ------------------------------------------------------------------------------ 177 23-2590 0-88 surficial 88-180 red rock ------------------------------------------------------------------------------ 178 23-3699 0-50 surficial 50-320 siltstone and sandstone ------------------------------------------------------------------------------ 180 23-7210 0-92 surficial 92-412 red shale and sandstone ------------------------------------------------------------------------------ 181 23-4438 0-25 surficial 25-78 red rock ------------------------------------------------------------------------------ 182 23-2107 0-38 surficial 38-79 reddish trap rock 79-130 gray trap rock ------------------------------------------------------------------------------ 183 23-222 0-21 surficial 21-105 diabase ------------------------------------------------------------------------------ 184 23-7950 0-6 surficial 6-44 broken trap rock to solid trap 44-205 mixture of various conglomerate rock ------------------------------------------------------------------------------ 189 NJGS 0-35 surficial 35-36 soft red and green sandstone ------------------------------------------------------------------------------ Tl R Tla R NEWARK BASIN Unconformity Jurassic Triassic Ordovician- Middle Proterozic Intrusive contact CORRELATION OF MAP UNITS Jd JTp R JTps R Tsah R Tsa R OYu 1 Numbers of the form 23-xxxx or 26-xxxx are well permit numbers issued by the N.J. Department of Environmental Protection, Bureau of Water Allocation. The notation “BWA files” followed by a number of the form 23-xx-xxx indicates NJ Atlas Sheet grid locations of logs in the Bureau of Water Allocation files that do not have permit numbers. Notations of the form N 23-44-213 are NJ Atlas Sheet grid locations of entries in the permanent note collection of the NJ Geological Survey. 2 Depth in feet below land surface. 3 All descriptions are reproduced as they appear in the original source, except for minor format, punctuation, and spelling changes. All surficial units have been abbreviated into a single unit. Details on surficial units can be found in Stanford (2002). Map units are inferred from the known extent of materials at the surface and from known depositional settings, in addition to driller’s descriptions. Well table modified from Stanford (2002) 41 o 00' 57'30" HACKENSACK PARK RIDGE 55' 40 o 52'30" 74 o 00' 57'30" CENTRAL PARK Base from U. S. Geological Survey, Yonkers N.Y., N.J 1954. Photorevised 1979 Base from U. S. Geological Survey, Nyack N.Y., N.J. 1967 57'30" REFERENCES Block, K.A., 2006, A refined multiple injections model for the Palisades Sill, New York and New Jersey, PhD Dissertation, City University of New York, NY, 186p. Block, K.A., Steiner, J.C., and Rice, A., 2004, Toward a comprehensive model for the Palisades: tracing new internal contacts, in, Puffer, J.H., and Volkert, R.A., eds, Neoproterozoic, Paleozoic, and Mesozoic intrusive rocks of northern New Jersey and southeastern, New York, Twenty-First Annual Meeting, Geological Association of New Jersey, Mahwah, NJ, p. 93-99. Burgdorff, K., and Goldberg, D., 2001, Petrophysical characterization and natural fracturing in an olivine-dolerite aquifer, Electronic Geosciences v.6, no.3, p.1-28. Darton, N.H., 1902, Juratrias rocks, in, Merrill, F.J.H., Darton, N.H., Hollick, A., Salisbury, R.D., Dodge, R.F., Willis, B., and Pressey, H.A., Description of the New York City district, U.S.G.S. New York City Folio 83. Dickson, L.D., 2006, Detailed textural analysis of the Palisades sill, New Jersey, PhD Dissertation, University of Connecticut, Storrs, CT, 183p. Drake, A.A., Jr., Volkert, R.A., Monteverde, D.H., Herman, G.C., Houghton, H.F., Parker, R.A., and Dalton, R.F., 1996, Bedrock geologic map of northern New Jersey, U.S.G.S. Miscellaneous Investigations Map I-2540-A, scale 1:100,000. Dunning, G.R., and Hodych, J.P., 1990, U/Pb zircon and baddeleyite ages for the Palisades and Gettysburg sills of the northeastern United States: implications for the age of the Triassic/Jurassic boundary, Geology, v.18, p.795-798. Goldberg, D. and Burgdorff, K., 2005, Natural fracturing and petrophysical properties of the Palisades dolerite sill, in, Petrophysical Properties of Crystalline Rocks, Harvey, P. K., Brewer, T. S., Pezard, P. A. and Petrov, V. A. (eds.), Proc. Geol. Society, London, Special Publ. no. 240, 25-36. Gorring, M.L., and Naslund, H.R., 1995, Geochemical reversals within the lower 100 m of the Palisades sill, New Jersey, Contributions to Mineralogy and Petrology, v. 119, p. 263-276. 41 o 00' 57'30" 55' 53 Jd Jd Jd Jd Jd Jd Jd Jd Jd Tla R Tla R Tla R Tla R Tla R Tla R Tlah R Tlah R Tlah R Tlah R Tlah R Tlah R Tlh R Tlh R Tlh R Tlh R Tlh R Tlh R Tsah R Tsah R Tsah R Tsah R Tsah R JT Rp JT Rp JT Rp JT Rp JT Rp JT Rp JT Rp JT Rp JT Rp JT Rp JT Rp JT Rp JT Rp JT Rps JT Rps JT Rps JT Rps JT Rps JT Rps JT Rps JT Rps JT Rps JT Rps JT Rps B’ B’ B SEA LEVEL 1000 2000 3000 1000 SEA LEVEL 1000 2000 3000 1000 Jd JTps R Tla R Tlh R Tlah R OYu Tsah R Tsa R B A A’ SEA LEVEL 1000 2000 3000 1000 SEA LEVEL 1000 2000 3000 1000 Jd JTps R Tla R Tlh R Tlah R Jd OYu Tsah R Tsa R Well 75 A’ A JTp R JTps R Demarest Brook Hudson River Palisades Parkway Tenakill Brook Knickerbocker Road Schraalenburgh Road Oradell Reservoir Washington Avenue Knickerbocker Road Englewood Road small stream small stream small stream Hudson River Palisades Parkway 88 readings from 43 stations N Joints in Lockatong Argillite 12 9 6 12 9 6 12 9 6 12 9 6 N 25 readings from 13 stations Joints in Stockton Formation 15 10 5 20 15 10 20 5 20 15 10 5 15 10 5 20 N 15 10 15 10 5 15 10 5 15 10 43 readings from 43 stations Bedding in Lockatong Argillite N 30 20 30 20 10 30 20 10 10 20 30 10 13 readings from 13 stations Bedding in Stockton Formation N 57 readings from 57 stations All bedding in Stockton and Lockatong Formations 15 20 10 15 20 10 5 15 20 10 5 15 20 10 224 readings from 95 stations 8 6 4 8 6 4 8 6 4 8 6 4 Joints in Diabase N N 14 10 6 10 6 14 5 14 10 6 5 14 10 6 112 readings from 56 stations All Joints in Stockton and Lockatong Formations Figure 1. Trends of mapped bedding and fractures. Joints in Diabase rose diagram contains red lines corresponding to dominant joint strike trends in Burgdorff and Goldberg (2001) and blue lines corre- sponding to dominant joint strike trends in Lewis (1908).

NJDEP - NJGS - Geologic Map Series GMS11-1, Bedrock ... · others, 1988; de Boer and Clifford, 1988). Episodic, periodic motion on these faults increased the sediment input into the

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Page 1: NJDEP - NJGS - Geologic Map Series GMS11-1, Bedrock ... · others, 1988; de Boer and Clifford, 1988). Episodic, periodic motion on these faults increased the sediment input into the

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10 JTRps

JTRp

TRl

TRsa

Jd

DESCRIPTION OF MAP UNITS

Diabase (Lower Jurassic) -- Fine-grained to aphanitic dikes (?) and sills and medium-grained, discordant, sheet-like intrusion of dark-gray to dark greenish-gray, sub-ophitic diabase; massive-textured, hard, and sparsely fractured. Composed dominantly of plagioclase, clinopyroxene, and opaque minerals. Olivine zone occurs aproximately 45 ft above the base of the sill. Finely laminated horizons occur in the upper third of the unit. Contacts are typically fine-grained, display chilled, sharp margins adjacent to intruded sedimentary rocks. Internal chilled horizons have been observed by Steiner and others (1992), Block and others (2004) and Block (2006). Thickness of the Palisades Sill diabase in the quadrangle is approximately 1,300 feet.

Passaic Formation - (Lower Jurassic and Upper Triassic) (Olsen, 1980a) - Covered by surficial deposits and described from regional exposures and drill core examinations. Interbedded sequence of reddish-brown to maroon and purple, conglomerate, fine- to coarse-grained arkosic sandstone and less common, siltstone, shaly siltstone, silty mudstone and mudstone, and less common olive-gray, dark-gray, or black siltstone, silty mudstone, shale and lesser silty argillite. Regionally unit coarsens towards the north and northwest and fines towards the southwest. Unit dominated in mapped area by interbedded reddish-brown, fine- to coarse-grained arkosic sandstone, locally conglomeratic (JTRps, identified from well logs, table 1), siltstone, and shaly siltstone. Reddish-brown arkosic sandstone and siltstone are thin- to medium-bedded, planar to cross-bedded, micaceous, and locally mudcracked and ripple cross-laminated. Root casts and load casts are common. Shaly siltstone, silty mudstone, and mudstone are fine-grained, very thin to thin-bedded, planar to ripple cross-laminated, locally fissile, bioturbated, and contain evaporite minerals. Less common unit (JTRp, identified from well logs, table 1) contains siltstone, shaly siltstone, silty mudstone and mudstone. Reddish-brown siltstone is medium- to fine-grained, thin- to medium-bedded, planar to cross-bedded, micaceous, locally containing mud cracks, ripple cross-lamination, root casts and load casts. Shaly siltstone, silty mudstone, and mudstone form rhythmically fining upward sequences up to 15 feet thick. They are fine-grained, very-thin- to thin-bedded, planar to ripple cross-laminated, fissile, locally bioturbated, and locally contain evaporate minerals. Unit is approximately 11,000 feet thick in the map area.

Lockatong Formation (Upper Triassic) (Kummel, 1898) - Cyclically deposited sequences of mainly gray to greenish-gray, siltstone and white to buff arkosic sandstone and local pebble conglomerate. Siltstone is medium- to fine-grained, thin-bedded, laminated, platy to massive. Arkose (TRla) has affinities for the Stockton Formation and is massive to cross-bedded. Symmetrical crossbedding that indicates bi-directional flow only found here and not in the Stockton. Occurs in the middle to upper section of cycles. Thermally altered to dark gray to black hornfels (TRlh) consisting of plagioclase, orthoclase and recrystallized diopside-rich arkose and calc-silicate minerals such as grossularite, diopside and prehnite in siltstone beds and biotite and albite in finer grained beds (Olsen 1980c, Van Houten, 1969). Arkosic units show a less penetrative degree of hornfels (TRlah). Lower contact gradational into Stockton Formation and placed at base of lowest continuous black siltstone bed (Olsen, 1980c). Maximum thickness of unit regionally is about 700 feet (Parker, 1993).

Stockton Formation (Upper Triassic) (Kummel, 1898) - Unit is interbedded sequence of gray, grayish-brown, or slightly reddish-brown, medium- to fine-grained, thin- to thick-bedded, poorly sorted, to clast imbricated conglomerate, planar to trough cross-bedded, and ripple-cross laminated arkosic sandstone, and reddish-brown clayey fine-grained, sandstone, siltstone and mudstone. Sedimentary structures indicate uni-directional flow Coarser units commonly occur as lenses and are locally graded; finer units are bioturbated. Cycles are fining upwards. Conglomerate and sandstone units are deeply weathered and more common in the lower half; siltstone and mudstone are generally less weathered and more common in upper half. Upper section of unit is thermally metamorphosed (TRsah) where in contact with Palisades Sill. Lower contact, not exposed is regionally an erosional unconformity. Thickness is approximately 750 feet based on Olsen and others (2004).

Mixed metamorphic units (Ordovician to Proterozoic) of the Piedmont - used only in cross section

??

U

D

??

EXPLANATION OF MAP SYMBOLS

Contact - Dashed where approximately located; queried where uncertain; dotted where concealed

Fault - U, upthrown side; D, downthrown side. Ball and post indicates direction of dip Dashed where approximately located; queried where uncertain; dotted where concealed

Arrows show relative motion

Motion is unknown

Folds Anticline - showing trace of axial surface, direction and dip of limbs, and direction of plunge.

Syncline - showing trace of axial surface, direction and dip of limbs, and direction of plunge.

Planar features

Strike and dip of inclined beds

Strike and dip of foliation in igneous rocks

Other features

Abandoned rock quarry

Field station in diabase

Location of well used in lithologic correlation. Well number correlates to well table

11

9

TRlh

TRlah

TRla

TRsah

INTRODUCTION

The Yonkers and Nyack, NY-NJ 7 1/2-minute quadrangles are continuous and parallel to the south-flowing Hudson River. The quadrangles occupy the northeastern corner of New Jersey. The Palisades is the dominant topographic feature; its sheer cliffs extend from sea level at the Hudson River up to 550 ft at the top of the ridge. In contrast a gently trending slope marks the western side of the Palisades. Secondary topographic features parallel the trend of the Palisades but only reach 160 ft. in elevation.

A suburban-urban landscape dominates the New Jersey side except for some limited parkland. Palisades Interstate Park, extending along the crest and the eastern slope of the Palisades and the several small local and state parklands and the Alpine Scout Camp, are some of the few remaining open islands of land amongst suburban housing tracts. Development density increases towards the south.

STRATIGRAPHY

The bedrock consists of sedimentary and plutonic formations of Mesozoic age in the Newark Basin, a rift basin formed during the breakup of the supercontinent Pangaea. The Newark Basin is a half-graben, bounded on the northwest by a series of northeast-striking, southeast-dipping border faults. Sequential fault movement from Late Triassic to Middle Jurassic time along back-stepping normal faults along the northwestern margin controlled basin morphology, and thereby, sediment-depositional patterns within the basin (Schlische, 1992, Olsen and others, 1996). Schlische (1992, 1993) suggested that movement along several major intrabasinal faults in the central part of the basin controlled depositional centers, as shown by regional sedimentary thickness patterns. Deformation and synchronous sedimentation continued into the Middle Jurassic when extensional faulting ceased. Compressional stresses began with the opening of the Atlantic Ocean. Most tectonic deformation is probably of Late Triassic to Middle Jurassic age (Lucas and others, 1988; de Boer and Clifford, 1988). Episodic, periodic motion on these faults increased the sediment input into the basin from a northern and a western Highlands source, as well as a southeastern one. A strong basin-parallel sedimentation trend exhibiting a northern provenance filled the northeastern margin of the Newark Basin. Other Highland-based fluvial sediments entered the basin along rider blocks between the backstepping boundary faults. Several pulses of mafic magma intruded the basin sediments and reached the paleosurface regionally to form thick basalt volcanics. All magmatic activity took place during the Early Jurassic. The Newark Basin has continued to erode and has supplied sediment to the Atlantic coastal region (Poag and Sevon, 1989; Pazzaglia, 1993). A mantle of glacial and postglacial deposits of probable Illinoisan to late Wisconsinan age overlies the Mesozoic bedrock throughout the area (Stanford, 2002). Glaciers polished and striated the resistant diabase of the Palisades while glacial sediments blanketed the less resistant Mesozoic sedimentary rocks, thereby limiting their exposure to small streams draining the western slope of the ridge. The diabase of the Palisades ridge forms a steeply dipping eastern cliff face. Its contact with the underlying sediments is exposed locally along the cliff base except where covered by talus from the cliffs.

Parker and others (1988) and Parker (1993) subdivided the Passaic Formation along the northern Newark Basin into several facies in a coarsening-upwards and along-strike succession from southwest to north-northwest. A near-source conglomerate-to-sandstone sequence at the northern edge of the basin grades southward into more distal, finer, mudstone-dominated beds. They mapped a sandstone and minor siltstone facies underlying the western mapped area. Surficial material blankets the Passaic except at a single possible outcrop of pebble conglomerate in a coarse-grained, poorly sorted matrix that lies at the high school in Demarest, N.J. Well log and core data supply sufficient information on the Passaic to divide it into two facies. Core samples are dominated by a coarse-grained arkosic sandstone and interbedded fine-to-medium-grained sandstone. Driller’s logs (table 1) are not detailed enough to clearly define the Passaic facies throughout the area. Mapping suggests that the conglomerate and sandstone facies continues farther to the east, closer to the Lockatong arkosic facies than previously mapped by Parker and others (1988) and Parker (1993). The Passaic may become finer southwestward along strike but is mapped here as a single unit.

The Lockatong along the Palisades occurs in two facies, an upper, coarser-grained arkosic-to-feldspathic sandstone, and a lower, black siltstone interbedded with a medium-to-coarse-grained, arkosic-to-feldspathic sandstone (Parker, 1993; Drake and others, 1996). Parker and others (1988) placed the upper arkosic facies in the Stockton Formation and classified only the siltstone/argillite sedimentary rocks as Lockatong. They suggested that the Lockatong thinned to the northeast and was replaced by the Stockton. Olsen, (1980a, 1980b, 1980c) and Olsen and others (1989) mapped the Lockatong as a single lithologic unit and described its fining-upwards cyclicity. They described the Lockatong along the Palisades as a coarser-grained basal unit composed of medium- to coarse-grained arkosic sandstone overlain by a thin siltstone unit. These cycles are correlated throughout the Newark Basin as the dominant grain size fines from coarse sand to siltstone (Olsen, 1980b, 1980c, Olsen and others, 1989, 1996, 2004). The Lockatong is a siltstone in the central part of the Newark Basin except where it occurs close to rider blocks (Drake and others, 1996). Here the sedimentary rocks are conglomeritic because they are closer to their source. Beds mapped as Lockatong within the study area contain cycles of a basal medium-to-coarse-grained arkosic sandstone and less-well-defined quartz sandstone overlain by a thin dark gray siltstone, separated by interbedded dark-gray argillite in the Lockatong. However the arkosic sandstone mapped here lacks exposed gray siltstone interbeds.

The Lockatong lenses into the Passaic or Stockton along the northern edge of the Newark Basin (Olsen, 1980b, 1980c). The dstinction between the Lockatong and Stockton here is based on the work of Olsen and others (2004). Sedimentary structures distinguish the lacustrine Lockatong from the fluvial environments of the Stockton (Paul Olsen, oral communication, 2008).

Volkert and others (1996) mapped Proterozoic to Paleozoic metamorphic rocks cropping out along the Hoboken waterfront. These units form the basement for the Stockton sedimentary beds and, though not exposed in the study area are believed to continue northward under the Hudson River and across the Yonkers quadrangle. Olsen and others (2004) drew the contact between the Mesozoic sedimentary and older metamorphic rocks near the midchannel of the Hudson River.

PALISADES SILL

The rocks of the Palisades Sill dominate all the bedrock exposures. They form the northern end of a semicontinuous intrusive sheet, broken by faults, and covered locally by coastal plain deposits, that extends across central New Jersey and correlates with the Gettysburg Sill of Pennsylvania (Dunning and Hodych, 1990; Husch, 1990). Dunning and Hodych (1990) used zircons and baddeleyites to calculate a mean U/Pb age of nine samples as 200.9+ 1.0 Ma. The Palisades is part of the extensive Central Atlantic Magmatic Pulse (CAMP) that includes igneous units in South America, Africa and Europe (Marzoli and others, 1999). These deposits mark the initial stages of the breakup of the supercontinent Pangaea.

The Palisades is a high-titanium quartz-normative tholeiite (Husch, 1990; Gorring and Naslund, 1995; Dickson, 2006) that varies to a fine-grained diabase and gabbro (Olsen and others, 2004). Olivine is a dominant mineral in a layer approximately 15 m above the base of the sill (Lewis, 1908; Husch, 1990; Gorring and Naslund, 1995). Block and others (2004) described this zone as occurring higher in the Palisades sill towards the north.

The Palisades Sill has continued to be the subject of much scientific study as new field and geochemical studies have prompted diverse modes of origin. Initial work suggested that the sill formed from a single magmatic pulse that underwent fractional crystallization and crystal settling (Lewis, 1908; Walker, 1940; Pearce, 1969). More recent workers have suggested that the Palisades consists of two (Walker, 1969), three (Block and others, 2004; Block, 2006) to potentially four individual magmatic pulses (Shirley, 1987; Steiner and others, 1992). Compaction of the crystalline magma accounts for some of the mineral banding in the upper section of the sill (Steiner and others, 1992; Block and others, 2004; Block, 2006). Philpotts and Dickson (2002) and Dickson (2006) attributed a light-dark microbanding of plagioclase-pyroxene clusters to crystallization near the roof of the sill that subsequently sank into the remaining melt. Block and others (2004) and Block (2006) proposed that the multiple magmatic pulses can be correlated to the basalt formations cropping out farther west in central New Jersey.

STRUCTURE

Lewis (1908) noted dominant joint trends of 0o, 20o and 45o that are perpendicular to the upper and lower contact surfaces. These joints dip gently westward parallel to contacts with hornfels. South of the study area, north-south-trending crushed zones as much as four feet wide repeat across the outcrop as shear zones (Lewis, 1908). He indicated that displacement may extend hundreds of feet along these wide zones. The location of a deep ravine has been used to delineate a fault extending north-south along the west side of the Palisade ridge which would project into the study area (Kummel, 1898; Darton, 1902; Parker, 1993; Drake and others, 1996). However no evidence of this fault has been found in this study. This sediment-diabase contact has been interpreted instead as an igneous contact. It marks where the magma migrated upsection into younger beds. Along strike two other small diabase bodies occur in the Lockatong arkosic facies above the main Palisades body in Alpine with no evidence of faulting. Burgdorff and Goldberg (2001), Goldberg and Burgdorff (2005) and Matter and others (2006) record diabase stringers intruding the Lockatong sedimentary beds below the lower contact of the main Palisades sill. A similar stringer intrusion occurs near the upper contact between the Palisades and the Lockatong in Rockleigh, NJ.

Burgdorff and Goldberg (2001) and Matter and others (2006) studied fracture trends in two wells drilled into the diabase along the Palisades directly across the state line, in New York. These wells penetrated 620 ft and 750 ft of diabase respectively and 125 ft and 250 ft of the underlying hornfels respectively. Both holes were geophysically logged and fracture data were collected using a borehole televiewer logger. Vertical fractures showed dominant trends striking 41o, 88o, 93o and 103o (Burgdorff and Goldberg, 2001). Horizontal fractures were abundant near the lower contact of the diabase. Diabase fractures mapped in the area vary widely in strike from 10o to 50o, a weaker trend strikes 100o to 120o (fig. 1). These trends broadly correspond to those of Lewis (1908), Burgdorff and Goldberg (2001), and Matter and others (2006) except for the dominant E-W trend observed in the downhole logs but not mapped in the surface. Fractures in the Stockton trend 0o-20o whereas in the Lockatong they trend 30o-40o (fig. 1).

Husch, J.M., 1990, Palisades sill: origin of the olivine zone by separate magmatic injection rather than gravity settling, Geology, v.18, p.699-702.

Kummel, H.B., 1897, The Newark system, report of progress, New Jersey Geological Survey, Annual report of the State Geologist 1896, p.27-88.

Kummel, H.B., 1898, The Newark system or red sandstone belt, New Jersey Geological Survey, Annual report of the State Geologist 1897, p.23-164.

Latypov, R., 2003, The origin of basic-ultrabasic sills with S-, D- and I-shaped compositional profiles by in situ crystallization of a simple input of phenocryst-poor parental magma, Journal of Petrology, v.44, p.1619-1656.

Lewis, J.V., 1908, Petrography of the Newark igneous rocks of New Jersey, New Jersey Geological Survey Annual Report of the State Geologist 1907, p.97-167.

Lucas, M., Hull, J., and Manspeizer, W., 1988, A foreland-type fold and related structures in the Newark Rift Basin, in, Manspeizer, W., ed., Triassic-Jurassic rifting, continental breakup and the origin of the Atlantic Ocean and passive margins, part A., Elsevier Science Publishers, New York, p.307-332.

Marzoli, A., Renne, P.R., Piccirillo, E.M., Ernesto, M., Bellieni, G., and De Min, A., 1999, Extensive 200-million-year-old continental flood basalts of the Central Atlantic Magmatic Province, Science, v.284, p.616-618.

Matter, J.M., Goldberg, D.S., and Morin, R.H., 2006, Contact zone permeability at intrusion boundaries: new results from hydraulic testing and geophysical logging in the Newark Rift Basin, New York, USA, Hydrogeology Journal, v.16, p.689-69.

Olsen, P.E., 1980a, The latest Triassic and Early Jurassic formations of the Newark basin (eastern North America, Newark Supergroup): Stratigraphy, structure, and correlation: New Jersey Academy of Science Bulletin, v. 25, p. 25-51.

Olsen, P.E., 1980b, Triassic and Jurassic formations of the Newark basin, in, Manspeizer, Warren, ed., Field studies of New Jersey Geology and guide to field trips: 52nd Annual Meeting of the New York State Geological Association, p. 2-41.

Olsen, P.E., 1980c, Fossil great lakes of the Newark Supergroup in New Jersey, in, Manspeizer, Warren, ed., Field studies of New Jersey Geology and guide to field trips: 52nd Annual Meeting of the New York State Geological Association, p. 352-398.

Olsen, P.E. Kent, D.V., and Whiteside, J.H., 2004, The Newark Basin, the Central Atlantic Magmatic Province and the Triassic-Jurassic boundary, A field trip, run on May 23, 2004, in conjunction with the 8th Annual DOSECC Workshop on Continental Scientific Drilling May 22-25, 2004, Rutgers University, New Brunswick, New Jersey, 45p.

Olsen, P.E., Kent, D.V., Cornet, B., Witte, W.K., and Schlische, R.W., 1996, High-resolution stratigraphy of the Newark rift basin (early Mesozoic, eastern North America): Geological Society of America, Bulletin, v.108, p. 40-77.

Olsen, P. E., Schlische, R. W., Gore, P. J. W., and others, 1989, Field guide to the tectonics, stratigraphy, sedimentology, and paleontology of the Newark Supergroup, eastern North America. International Geological Congress, Guidebooks for Field Trips T351, 174p.

Parker, R.A.,1993, Stratigraphic relations of the sedimentary rocks below the Lower Jurassic Orange Mountain Basalt, northern Newark Basin, New Jersey and New York: U.S.G.S. Miscellaneous Field Studies, MF-2208, scale 1:100,000.

Parker, R.A., Houghton, H.F., and McDowell, R.C., 1988, Stratigraphic framework and distribution of Early Mesozoic rocks of the northern Newark Basin, New Jersey and New York: in, Froelich, A.J., and Robinson, G.R., Jr., eds, Studies of the Early Mesozoic Basins in the eastern United States, U.S. Geological Survey Bulletin 1776, p.31-39.

Pazzaglia, F.J., 1993. Stratigraphy, petrography, and correlation of late Cenozoic middle Atlantic Coastal Plain deposits: implications for late-stage passive-margin geologic evolution, Geological Society of America Bulletin, 105, p.1617-1634.

Pearce, TH., 1969, Chemical variations in the Palisade sill, Journal of Petrology, v.11, p.15-32.Philpotts, A.R., and Dickson, L.D., 2002, Millimeter-scale modal layering and the nature of the upper

solidification zone in thick flood-basalt flows and other sheets of magma, Journal of Structural Geology, v. 24, p.1171-1177.

Poag, C.W., and Sevon, W.D., 1989. A record of Appalachian denudation in postrift Mesozoic and Cenozoic sedimentary deposits of the U.S. middle Atlantic continental margin, Geomorphology, v.2, p.119-157.

Schlische, R.W., 1992, Structural and stratigraphic development of the Newark extensional basin, eastern North America: Evidence for the growth of the basin and its bounding structures; Geological Society of America Bulletin, v. 104, p.1246-1263.

Schlische, R.W., 1993, Anatomy and evolution of the Triassic-Jurassic continental rift system, eastern North America; Tectonics, v.12, p.1026-1042.

Shirley, D.N., 1987, Differentiation and compaction in the Palisades Sill, New Jersey, Journal of Petrology, v.28, p.835-865.

Stanford, S.D., 2002, Surficial geology of the Yonkers and Nyack quadrangles, Bergen County, New Jersey, New Jersey Geological Survey Open-File Map, OFM-50, scale 1:24,000.

Steiner, J.C., Walker, R.J., Warner, R.D., and Olson, T.R., 1992, A cumulus-transport-deposition model for the differentiation of the Palisades sill, Geological Society of America Special Paper 268, p.193-217.

Van Houten, F.B., 1969, Late Triassic Newark Group, north central New Jersey and adjacent Pennsylvania and New York; in, Subitzky, S., ed., Geology of selected area in New Jersey and eastern Pennsylvania and guidebook of excursions; Rutgers University Press, New Brunswick, New Jersey, p. 314-347.

Van Houten, F.B., 1980, Late Triassic part of Newark Supergroup, Delaware River section, west-central New Jersey; in, Manspeizer, Warren, ed., Field studies of New Jersey geology and guide to field trips: 52nd Annual Meeting of the New York State Geological Association, p. 264-276.

Volkert, R.A., Drake, A.A., Jr., and Sugarman, P.J., 1996, Geology, geochemistry, and tectonostratigraphic relations of the crystalline basement beneath the Coastal Plain of New Jersey and contiguous areas, U.S. Geological Survey Professional Paper 1565-B, 48p.

Walker, F., 1940, The differentiation of the Palisades diabase, New Jersey, Geological Society of America, Bulletin v.51, p.1059-1106.

Walker, K.R., 1969, The Palisades sill, New Jersey: a re-investigation, Geological Society of America, Special Paper 111, 178p.

7000 FEET1000 10000 2000 3000 4000 5000 6000

.5 1 KILOMETER1 0

SCALE 1:24 00021 0 1 MILE

LOCATION IN NEW JERSEY

Bedrock Geologic Map of the Yonkers and NyackQuadrangles, Bergen County, New Jersey

ByDonald H. Monteverde

2011

Bedrock geology mapped by D.H. Monteverde in 2007-2008Digital cartography by D.H. Monteverde

Research supported by U.S. Geological Survey,National Cooperative Geologic Mapping Program,

under USGS award number 05HQAG0026.The views and conclusions in this document are those

of the author and should not be interpretedas necessarily representing the official policies,

either expressed or implied, of the U.S. Government.

1835

CONTOUR INTERVAL 20 FEETNational Geodetic Vertical Datum of 1929

Photorevised 1981

(WEEHAW

KEN)

MA

GN

ETIC

NO

RTH

APPROXIMATE MEANDECLINATION, 1981

TRU

E N

OR

TH

12 / 1 2o

DEPARTMENT OF ENVIRONMENTAL PROTECTIONWATER RESOURCE MANAGEMENTNEW JERSEY GEOLOGICAL SURVEY

Prepared in cooperation with theU.S. GEOLOGICAL SURVEY

NATIONAL GEOLOGIC MAPPING PROGRAM

BEDROCK GEOLOGIC MAP OF THE YONKERS AND NYACK QUADRANGLES, BERGEN COUNTY, NEW JERSEY

GEOLOGIC MAP SERIES GMS 11-1

OYu

Table 1.--Selected Well and Boring Logs

Well Identifier1 Driller’s Log

No. -------------------------------------------------- Depth

2 Description

3

------------------------------------------------------------------------------1 26-6059 0-8 dirt 8-250 red shale------------------------------------------------------------------------------2 26-828 0-71 surficial 71-180 sandstone in all colors 180-200 trap------------------------------------------------------------------------------3 26-2237 0-115 surficial 115-298 soft red rock------------------------------------------------------------------------------4 26-4066 0-57 surficial 57-300 red rock------------------------------------------------------------------------------5 26-4421 0-120 surficial 120-324 red rock------------------------------------------------------------------------------6 26-4422 0-120 surficial 120-450 red rock------------------------------------------------------------------------------7 26-810 0-99 surficial 99-380 pale red sandstone 380-410 gray argillite + sandstone 410-470 light gray sandstone + trap fragments------------------------------------------------------------------------------8 26-4328 0-120 surficial 120-356 red rock------------------------------------------------------------------------------10 26-461 0-55 surficial 55-250 red shale 250-400 sand rock 400-410 trap------------------------------------------------------------------------------11 26-2781 0-46 surficial 46-396 red rock------------------------------------------------------------------------------12 26-4357 0-35 surficial 35-370 sandstone and trap------------------------------------------------------------------------------13 26-791 0-135 surficial 135-354 sandstone------------------------------------------------------------------------------14 26-6111 0-146 surficial 146-242 sandstone------------------------------------------------------------------------------ 15 26-7000 0-121 surficial at 121 red shale------------------------------------------------------------------------------17 26-2427 0-140 surficial 140-380 shale------------------------------------------------------------------------------18 26-6142 0-155 surficial 155-300 red rock------------------------------------------------------------------------------21 26-3519 0-20 surficial 20-345 trap rock------------------------------------------------------------------------------22 26-3430 0-18 surficial 18-570 trap rock-----------------------------------------------------------------------------23 26-4043 0-18 surficial 18-265 trap rock------------------------------------------------------------------------------24 26-4716 0-151 surficial 151-202 red shale------------------------------------------------------------------------------25 26-2436 0-30 surficial 30-300 sandstone------------------------------------------------------------------------------26 26-4489 0-22 surficial 22-300 red rock------------------------------------------------------------------------------27 26-4217 0-50 red shale 50-230 sandstone------------------------------------------------------------------------------28 26-5079 0-21 surficial 21-200 red rock------------------------------------------------------------------------------29 26-785 0-76 surficial 76-158 red rock------------------------------------------------------------------------------31 26-3429 0-20 surficial 20-161 red rock------------------------------------------------------------------------------33 26-4752 0-25 surficial 25-70 red shale------------------------------------------------------------------------------34 26-3853 0-27 surficial 27-200 sandstone and shale ledges------------------------------------------------------------------------------35 26-3271 0-15 surficial 15-198 shale------------------------------------------------------------------------------36 26-145 0-20 surficial 20-200 red rock------------------------------------------------------------------------------37 26-3730 0-20 surficial 20-25 soft red shale 25-230 red sandstone------------------------------------------------------------------------------38 26-3491 0-24 surficial 24-96 red rock------------------------------------------------------------------------------39 26-3898 0-47 surficial 47-96 white and purple sandstone------------------------------------------------------------------------------40 26-3691 0-21 surficial 21-210 trap rock 210-235 red or pink trap rock------------------------------------------------------------------------------41 26-1357 0-29 surficial 29-176 conglomerate 176-180 dark gray trap rock------------------------------------------------------------------------------42 26-1798 0-52 surficial 52-202 red rock------------------------------------------------------------------------------43 26-1615 0-19 surficial 19-100 sand rock------------------------------------------------------------------------------44 26-4394 0-28 surficial 28-107 red sandstone------------------------------------------------------------------------------45 26-2787 0-38 surficial 38-107 red sandstone------------------------------------------------------------------------------46 26-4103 0-73 surficial 73-145 red sandstone------------------------------------------------------------------------------47 26-3825 0-12 surficial 12-38 shale 38-125 red rock + sandstone mixed------------------------------------------------------------------------------48 26-663 0-37 surficial 37-50 brown stone------------------------------------------------------------------------------49 26-1169 0-20 surficial 20-75 red rock ------------------------------------------------------------------------------51 26-533 0-74 surficial 74-125 red sandstone------------------------------------------------------------------------------53 26-4336 0-30 surficial 30-165 trap rock, some reddish fine sandstone------------------------------------------------------------------------------54 26-3492 0-10 surficial 10-97 trap rock------------------------------------------------------------------------------55 26-5817 0-8 surficial 8-740 granitic rock (diabase) 740-1000 red shale------------------------------------------------------------------------------56 23-8340 0-15 surficial 15-243 trap rock 243-367 red shale------------------------------------------------------------------------------57 23-8314 0-40 surficial 40-800 trap rock------------------------------------------------------------------------------58 23-463 0-31 surficial 31-68 sandstone------------------------------------------------------------------------------59 23-2348 0-72 surficial 72-276 sandstone------------------------------------------------------------------------------60 23-2273 0-72 surficial 72-279 sandstone------------------------------------------------------------------------------61 23-5056 0-76 surficial 76-164 red sandstone------------------------------------------------------------------------------62 23-4388 0-21 surficial 21-185 red rock------------------------------------------------------------------------------63 23-4533 0-21 surficial 21-170 red sandstone------------------------------------------------------------------------------64 23-7583 0-14 surficial at 14 shale------------------------------------------------------------------------------

65 23-4657 0-16 surficial 16-150 red sandstone------------------------------------------------------------------------------66 23-7108 0-12 surficial 12-114 red sandstone------------------------------------------------------------------------------67 23-7404 0-34 surficial 34-50 shale------------------------------------------------------------------------------68 23-7190 0-30 surficial 30-150 red shale------------------------------------------------------------------------------69 23-7174 0-30 surficial 30-159 red shale------------------------------------------------------------------------------70 23-8956 0-85 surficial 85-118 sandstone------------------------------------------------------------------------------71 23-4597 0-93 surficial 93-200 red rock------------------------------------------------------------------------------72 23-4232 0-10 surficial 10-670 trap rock------------------------------------------------------------------------------73 23-7743 0-3 surficial 3-1085 granite (diabase)------------------------------------------------------------------------------74 23-6889 0-40 surficial 40-200 shale + sandstone------------------------------------------------------------------------------75 23-4637 0-24 surficial 24-110 white rock 110-137 trap------------------------------------------------------------------------------76 23-4424 0-34 surficial 34-150 red + white sandstone------------------------------------------------------------------------------77 23-5397 0-69 surficial 69-160 red sandstone------------------------------------------------------------------------------78 23-4596 0-3 surficial 3-15 shale 15-125 brown sandstone 125-200 red rock------------------------------------------------------------------------------79 23-4801 0-30 surficial 30-165 red sandstone------------------------------------------------------------------------------80 23-6344 0-50 surficial 50-167 red rock------------------------------------------------------------------------------81 23-4259 0-45 surficial 45-150 red rock------------------------------------------------------------------------------82 23-7586 0-28 surficial 28-170 red sandstone------------------------------------------------------------------------------83 BWA files 0-101 surficial 23-44-536 101-142 red shale------------------------------------------------------------------------------84 23-1139 0-26 surficial 26-106 red sandstone------------------------------------------------------------------------------85 23-1138 0-26 surficial 26-109 red sandstone------------------------------------------------------------------------------86 23-1117 0-35 surficial 35-106 red sandstone------------------------------------------------------------------------------87 23-6255 0-18 surficial 18-150 red rock------------------------------------------------------------------------------89 23-7279 0-76 surficial 76-90 red shale 90-160 brown fine sandstone 160-386 brown shale------------------------------------------------------------------------------90 23-6475 0-40 surficial 40-90 red sandstone------------------------------------------------------------------------------91 23-4570 0-17 surficial 17-125 red rock------------------------------------------------------------------------------92 23-4876 0-41 surficial 41-200 red sandstone------------------------------------------------------------------------------93 23-5631 0-16 surficial 16-185 red sandstone------------------------------------------------------------------------------94 23-4409 0-30 surficial 30-185 sandstone + red shale------------------------------------------------------------------------------95 23-499 0-44 surficial 44-100 red rock------------------------------------------------------------------------------96 23-8200 0-44 surficial 44-150 red sandstone------------------------------------------------------------------------------97 23-1302 0-72 surficial 72-75 red rock ------------------------------------------------------------------------------98 23-1184 0-84 surficial 84-88 brown sandstone 88-95 red shale------------------------------------------------------------------------------99 23-1981 0-85 surficial 85-90 red sandstone------------------------------------------------------------------------------102 23-1260 0-82 surficial 82-96 dusky red micaceous sandstone ------------------------------------------------------------------------------103 23-1451 0-79 gray surficial 79-89 red sandstone------------------------------------------------------------------------------104 23-1971 0-102 surficial 102-106 red rock------------------------------------------------------------------------------105 23-7381 0-12 surficial 12-120 red sandstone------------------------------------------------------------------------------106 23-4442 0-88 surficial 88-475 sandstone------------------------------------------------------------------------------107 23-6058 0-43 backfill 43-175 red sandstone------------------------------------------------------------------------------108 23-7908 0-50 surficial 50-120 red shale------------------------------------------------------------------------------109 23-878 0-38 surficial 38-122 red sandstone------------------------------------------------------------------------------110 23-4446 0-34 surficial 34-50 red rock------------------------------------------------------------------------------111 23-5838 0-20 surficial 20-348 red rock------------------------------------------------------------------------------112 23-5940 0-33 surficial 33-346 red rock------------------------------------------------------------------------------113 23-5939 0-11 surficial 11-33 red shale 33-348 red rock------------------------------------------------------------------------------114 23-6267 0-81 surficial 81-252 sandstone------------------------------------------------------------------------------115 23-6345 0-49 surficial 49-171 red rock------------------------------------------------------------------------------116 23-4284 0-76 surficial 76-167 red rock------------------------------------------------------------------------------117 23-838 0-55 surficial 55-268 red sandstone------------------------------------------------------------------------------118 23-2471 0-52 surficial 52-150 red sandstone------------------------------------------------------------------------------119 23-1664 0-33 surficial 33-35 rock, soft sandstone 35-54 rock, hard sandstone------------------------------------------------------------------------------120 23-1672 0-138 surficial 138-401 red, brown shale + sandstone------------------------------------------------------------------------------121 23-5133 0-61 surficial 61-500 red shale------------------------------------------------------------------------------122 23-4196 0-36 surficial 36-248 red rock------------------------------------------------------------------------------123 23-3807 0-27 surficial 27-300 red rock + shales------------------------------------------------------------------------------125 23-2906 0-33 surficial 33-114 sandstone------------------------------------------------------------------------------126 23-4674 0-51 surficial 51-142 red rock------------------------------------------------------------------------------127 23-6320 0-38 surficial 38-102 soft red sandstone------------------------------------------------------------------------------

128 23-2099 0-40 surficial 40-85 red rock------------------------------------------------------------------------------129 23-8004 0-5 surficial 5-36 red rock 36-205 red sandstone------------------------------------------------------------------------------130 23-501 0-34 surficial 34-110 red sandstone------------------------------------------------------------------------------131 23-5977 0-25 surficial 25-31 white sandstone, coarse 31-150 white + red sandstone at 150 trap rock------------------------------------------------------------------------------132 23-4689 0-38 surficial 38-100 white sandstone 100-140 trap with white sandstone------------------------------------------------------------------------------133 23-6767 0-3 surficial 3-1205 trap rock------------------------------------------------------------------------------134 N23-44-322 0-47 surficial 47-594 red sandstone------------------------------------------------------------------------------136 23-5860 0-30 surficial 30-35 soft red shale 35-53 soft red sandstone 53-120 hard red sandstone------------------------------------------------------------------------------137 23-7297 0-60 surficial 60-125 red sandstone------------------------------------------------------------------------------138 23-7335 0-96 surficial 96-174 red shale with some streaks of sandstone------------------------------------------------------------------------------139 23-7844 0-45 surficial 45-68 red shale 68-205 sandstone + shale------------------------------------------------------------------------------140 23-1063 0-76 surficial 76-102 red sandstone------------------------------------------------------------------------------141 23-6873 0-63 surficial 63-200 argillite------------------------------------------------------------------------------142 23-6818 0-73 surficial 73-130 red sandstone------------------------------------------------------------------------------143 23-971 0-33 surficial 33-82 red rock------------------------------------------------------------------------------144 23-5521 0-26 surficial 26-145 red sandstone------------------------------------------------------------------------------145 23-1446 0-24 surficial 24-75 red sandstone------------------------------------------------------------------------------146 23-4108 0-43 surficial 43-364 shale + sand rock------------------------------------------------------------------------------147 23-1497 0-24 surficial 24-65 hard red sandstone 65-102 red shale------------------------------------------------------------------------------148 23-7788 0-50 surficial 50-160 red rock------------------------------------------------------------------------------149 23-3127 0-35 surficial 35-100 red sandstone------------------------------------------------------------------------------150 23-5228 0-28 surficial 28-500 red shale + sandstone------------------------------------------------------------------------------151 23-5590 0-30 surficial 30-50 shale 50-250 red rock------------------------------------------------------------------------------152 23-5879 0-33 surficial 33-125 red sandstone------------------------------------------------------------------------------153 23-3034 0-9 surficial 9-37 soft red shale 37-130 hard red shale------------------------------------------------------------------------------154 23-6831 0-51 surficial 51-200 red rock------------------------------------------------------------------------------155 23-927 0-36 surficial 36-72 red sandstone------------------------------------------------------------------------------156 23-7828 0-30 surficial 30-102 red shale------------------------------------------------------------------------------157 23-6642 0-19 surficial 19-96 red shale, red sandstone------------------------------------------------------------------------------158 23-4795 0-59 surficial 59-200 red sandstone------------------------------------------------------------------------------159 23-5520 0-25 surficial 25-145 red sandstone------------------------------------------------------------------------------160 23-7662 0-8 red hardpan 8-180 red sandstone------------------------------------------------------------------------------161 23-7107 0-48 surficial 48-107 red sandstone------------------------------------------------------------------------------162 23-7099 0-54 surficial 54-120 red sandstone------------------------------------------------------------------------------163 23-153 0-88 surficial 88-185 red rock------------------------------------------------------------------------------164 23-4248 0-45 surficial 45-210 red rock------------------------------------------------------------------------------165 23-4250 0-45 surficial 45-210 red rock------------------------------------------------------------------------------166 23-3259 0-36 surficial 36-171 red rock------------------------------------------------------------------------------170 23-6186 0-60 surficial 60-530 red rock------------------------------------------------------------------------------171 23-6016 0-65 surficial 65-500 red rock------------------------------------------------------------------------------172 23-4318 0-62 surficial 62-150 red rock------------------------------------------------------------------------------173 23-4285 0-90 surficial 90-450 red rock------------------------------------------------------------------------------174 23-321 0-70 surficial 70-145 red shale------------------------------------------------------------------------------175 23-300 0-76 surficial 76-150 red shale------------------------------------------------------------------------------177 23-2590 0-88 surficial 88-180 red rock------------------------------------------------------------------------------178 23-3699 0-50 surficial 50-320 siltstone and sandstone------------------------------------------------------------------------------180 23-7210 0-92 surficial 92-412 red shale and sandstone------------------------------------------------------------------------------181 23-4438 0-25 surficial 25-78 red rock------------------------------------------------------------------------------182 23-2107 0-38 surficial 38-79 reddish trap rock 79-130 gray trap rock------------------------------------------------------------------------------183 23-222 0-21 surficial 21-105 diabase------------------------------------------------------------------------------184 23-7950 0-6 surficial 6-44 broken trap rock to solid trap 44-205 mixture of various conglomerate rock------------------------------------------------------------------------------189 NJGS 0-35 surficial 35-36 soft red and green sandstone------------------------------------------------------------------------------

TlhRTlR

TlahRTlaR

NEWARK BASIN

Unconformity

Jurassic

Triassic

Ordovician-Middle Proterozic

Intrusive contact

CORRELATION OF MAP UNITS

Jd

JTpRJTpsR

TsahRTsaR

OYu

1Numbers of the form 23-xxxx or 26-xxxx are well permit

numbers issued by the N.J. Department of Environmental Protection, Bureau of Water Allocation. The notation “BWA files” followed by a number of the form 23-xx-xxx indicates NJ Atlas Sheet grid locations of logs in the Bureau of Water Allocation files that do not have permit numbers. Notations of the form N 23-44-213 are NJ Atlas Sheet grid locations of entries in the permanent note collection of the NJ Geological Survey. 2Depth in feet below land surface.

3All descriptions are reproduced as they appear in the original

source, except for minor format, punctuation, and spelling changes. All surficial units have been abbreviated into a single unit. Details on surficial units can be found in Stanford (2002). Map units are inferred from the known extent of materials at the surface and from known depositional settings, in addition to driller’s descriptions.

Well table modified from Stanford (2002)

41o00'

57'30"

HA

CK

ENSA

CK

PAR

K R

IDG

E

55'

40o52'30"74o00' 57'30" CENTRAL PARK

Base from U. S. Geological Survey, Yonkers N.Y., N.J 1954. Photorevised 1979Base from U. S. Geological Survey, Nyack N.Y., N.J. 1967

57'30"

REFERENCES

Block, K.A., 2006, A refined multiple injections model for the Palisades Sill, New York and New Jersey, PhD Dissertation, City University of New York, NY, 186p.

Block, K.A., Steiner, J.C., and Rice, A., 2004, Toward a comprehensive model for the Palisades: tracing new internal contacts, in, Puffer, J.H., and Volkert, R.A., eds, Neoproterozoic, Paleozoic, and Mesozoic intrusive rocks of northern New Jersey and southeastern, New York, Twenty-First Annual Meeting, Geological Association of New Jersey, Mahwah, NJ, p. 93-99.

Burgdorff, K., and Goldberg, D., 2001, Petrophysical characterization and natural fracturing in an olivine-dolerite aquifer, Electronic Geosciences v.6, no.3, p.1-28.

Darton, N.H., 1902, Juratrias rocks, in, Merrill, F.J.H., Darton, N.H., Hollick, A., Salisbury, R.D., Dodge, R.F., Willis, B., and Pressey, H.A., Description of the New York City district, U.S.G.S. New York City Folio 83.

Dickson, L.D., 2006, Detailed textural analysis of the Palisades sill, New Jersey, PhD Dissertation, University of Connecticut, Storrs, CT, 183p.

Drake, A.A., Jr., Volkert, R.A., Monteverde, D.H., Herman, G.C., Houghton, H.F., Parker, R.A., and Dalton, R.F., 1996, Bedrock geologic map of northern New Jersey, U.S.G.S. Miscellaneous Investigations Map I-2540-A, scale 1:100,000.

Dunning, G.R., and Hodych, J.P., 1990, U/Pb zircon and baddeleyite ages for the Palisades and Gettysburg sills of the northeastern United States: implications for the age of the Triassic/Jurassic boundary, Geology, v.18, p.795-798.

Goldberg, D. and Burgdorff, K., 2005, Natural fracturing and petrophysical properties of the Palisades dolerite sill, in, Petrophysical Properties of Crystalline Rocks, Harvey, P. K., Brewer, T. S., Pezard, P. A. and Petrov, V. A. (eds.), Proc. Geol. Society, London, Special Publ. no. 240, 25-36.

Gorring, M.L., and Naslund, H.R., 1995, Geochemical reversals within the lower 100 m of the Palisades sill, New Jersey, Contributions to Mineralogy and Petrology, v. 119, p. 263-276.

41o00'

57'30"

55'

53

Jd

Jd

Jd

Jd

Jd

Jd

Jd

Jd

Jd

TlaR

TlaR

TlaR

TlaR

TlaR

TlaR

TlahR

TlahR

TlahR

TlahR

TlahR

TlahR

TlhR

TlhR

TlhR

TlhR

TlhR

TlhR

TsahR

TsahR

TsahR

TsahR

TsahR

JTRp

JTRp

JTRp

JTRp

JTRp

JTRp

JTRp

JTRp

JTRp

JTRp

JTRp

JTRp

JTRp

JTRps

JTRps

JTRps

JTRps

JTRps

JTRps

JTRps

JTRps

JTRps

JTRps

JTRps

B’

B’B

SEA LEVEL

1000

2000

3000

1000

SEA LEVEL

1000

2000

3000

1000

Jd

JTpsR

TlaR

TlhR

TlahR

OYu

TsahRTsaR

B

A A’

SEA LEVEL

1000

2000

3000

1000

SEA LEVEL

1000

2000

3000

1000

Jd

JTpsR

TlaR

TlhR

TlahR

Jd

OYuTsahRTsaR

Well 75

A’

A

JTpR

JTpsR

DemarestBrook

HudsonRiver

PalisadesParkway

TenakillBrook

KnickerbockerRoad

SchraalenburghRoad

OradellReservoir

WashingtonAvenue

Knickerbocker Road

Englewood Road

small stream

small stream

small stream

HudsonRiver

PalisadesParkway

88 readings from 43 stations

N

Joints in Lockatong Argillite

1296

12

9

6

12

9

6

12 9 6

N

25 readings from 13 stations

Joints in Stockton Formation

15

10

5

20 15 10

20

5

2015105

15

10

5

20

N

15

10

15 10 5

15105

15

10

43 readings from 43 stations

Bedding in Lockatong Argillite

N

30

20

30 20 10

302010

10

20

30

10

13 readings from 13 stations

Bedding in Stockton Formation

N

57 readings from 57 stations

All bedding in Stockton and Lockatong Formations

15

20

10

1520 10 5

15 20105

15

20

10

224 readings from 95 stations

864

8

6

4

8

6

4

8 6 4

Joints in Diabase

N

N

14

10

6

10 6145 14 106

5

14

10

6

112 readings from 56 stations

All Joints in Stockton and Lockatong Formations

Figure 1. Trends of mapped bedding and fractures. Joints in Diabase rose diagram contains red lines corresponding to dominant joint strike trends in Burgdorff and Goldberg (2001) and blue lines corre-sponding to dominant joint strike trends in Lewis (1908).