New JerseyGeological SurveyGeological Survey Report 28

GRAPTOLITE BIOSTRATIGRAPHY OF THEORDOVICIAN MARTINSBURG FORMATION IN

NEW JERSEY AND CONTIGUOUS AREAS

by

David C. PardsNaturalHistoryBureau,New JerseyStateMuseum

205 West State Street,CN-530

Trenton,New Jersey 08625-0530

and

KennethM. Crt]ik_hallkM. KingHubbertGeomechanicsLabo_ttory

Departmentof Earthand AtmosphericSciencesPurdueUnive_ty

West Lafayette,Indiana 47907

New JerseyDeparlmentof EnvimftmcntalPmtectlcctand EnergyDivisioa ¢_Scienceand Retearcb

GecflogicalSurveyCN029

Trenton.NJ 08625

1992

New Jersey Geological Suntey Repc_ ([SSN 0741-7357) an_puMishMby the NewJen_yGe_ogicalSmvey.CN-O29,Tremc_NJ 09625. Th_ n_portmaybe tei_ducedin whole or pa_ providedth_ imitablen_enmce to the _zmce of thecop/ed materialis

Additionzlcopieso/'thhandother,_.,_._ maybe obtainedfrom:

Mg[_and Pal_ic_.iamSalesOH'_eBureauofRevenueCN-417

T_NJ 08625

A priceli_isavs/la_e_ reque_

Useefbrmd,onmmerclal,orre,demm_ isforidem_at[_puq_mesonlyanddoel_c_stitute endoctementby the New JerseyGeological Sarvey.

CONTENTSpage

Abstract ................................................... 1Introduction ................................................. 1

Acknowledgments ............................................ 1Collection methods ........................................... 1Previousstudies............................................. 2

Martinsburg Formation ............................................ 4

Geology ................................................. 4BiosWafigraphy .............................................. 5Graptofite zones ............................................. 5Faunal site descriptions ......................................... 5Overview ................................................ 13

Discussion ................................................. 14Conclusions ................................................. 14

Bibliography ................................................ 15Glossary .......................................... inside back cover

Illustrations

Figure 1. Map of northwestern New Jc_ey and contiguous areas showing distribution of

Marfinsburg Formation and locations of fossil-collection sites ................. 32. Geologic inteq_etations of the Lehigh River area of Pennsylvania; Martinsburg

Formation and associated rocks

A. Lithostratigraphy ...................................... 6

B. Bio61ratigraphy (graptolite zones) ............................. 6

Tables

Table 1. Graptolite zonation oftheOrdovician Marfinsburg Formation .................. 22. Faunal list for members of the Martinsburg Formation in the study area ............ 13

3. Summary of graptolite correlations for members of the Martinsburg Formation ........ 14

GRAPTOLrrE BIOSTRATIGRAPHY OF THE ORDOVICIANMARTINSBURG FORMATION IN

NEW JERSEY AND CONTIGUOUS AREAS

ABSTRACT

Paleontological collections, including many new graptolitediscoveries from northernNew Jersey,eastern Pennsylvania, and southeasternNew York, eonfh'm that the Ordovician MartinsburgForma-tion consists of threemembers: in ascendingorderthe Bushkill, Ramscyburgand Pen Argyl Mem-bers. The Bushkill and Pen Argyl Membersare not equivalent in age as previously suggested bysome authors. The Bushldll Member correlates with the Climacograptus bicornis to Corynoidesamericanus Zones. The Ramseyburg Member correlates with the interval represented by the Or-thograptus ruedemanni Zone and the lowest part of the Climacograptus spiniferus Zone. The PenArgyl Member correlateswith the upper part of the Climacograptus spiniferus Zone.

INTRODUCTION

The subdivision of the Ordovician Martinsburg Forma- Gallagher (New Jersey State Museum) gave field assis-tion in enstem Pennsylvania has been the subject of tance and helpful advice.much debate (Drake and Epstein, 1967; Wright and oth-

ers, 1979; Lash and others, 1984). A three-member di- Volunteers and interns who assisted in the field and lab-vision has been used by the U.S. Geological Survey in oratory were Rachel Benton, Wayne Brewster, Gregoryits mapping program. Some workers, however, believe Chludziaski, Lawrence Conti, Fia Coseia, Cherylthat the upper member of the threefold division is the Henry, Kenneth Langer, Abigail Miller, Louise Miller,lower member repeated by folding and faulting, so that Patrick Miller, and Charles Robbins. Several importantthe Martinsburgcontains only two members, sites were discovered by these volunteers and their dedi-

cated efforts as amateur paleontologists deserve ourThe objective of the present study was to obtain gratefuirecognifion.biostratigraphic data within the Martinsburg Formationand to evaluate its internal stratigraphy. Included in the Editorial reviews by Dr. Robert C. Ramsdell and I.G.study area are the typesections for all three members of Grossman are much appreciated. Allan Thomas, S.the formation (Drake and Epstein, 1967). This paper Donald Weeks, andEIsayedAhoyoussef, all of the Newpresents biostratigraphic information from the Martins- Jersey State Museum, assisted with preparation of fig-burg Formation in New Jersey (Wanen and Sussex ures and illustrations. We further acknowledge the kindCounties), Pennsylvania (Northampton County), and cooperationof many properly owners who allowed ac-New York (Orange County). The study area has cess to their lands. Their permission is, of course, ayielded fossils from all three stratigraphic units of the necessary prerequisite to any geological investigation,Martinsburg. This report also evaluates graptolite dam including fossil collecting.collected by Wright and others (1979) in the area be-twecn Harrisburg and the Lehigh River in Pennsylvania. COLLECTION METHODS

The Martinsburg Formation was searched for fossilsfrom Plainfield Township, in Northampton County,

Acknowledgments Pennsylvania, to Greenville, in Orange County, NewThis work was supported in part by a grant from the York. Generally, all madcuL streamcuL and quarryex-EasternNational Parks and MonumentsAssociation as a posures in New Jersey and selected exposures in Penn-project to evaluate resources of the Delaware Water sylvania and New York were examined. In manyGapNational Recreation Area. promising exposures, a bulk sample was collected and

searched under the binocular microscope in the labom-

The identification of graptolite specimens, especially tory. Samples of 100 kg were found to yield significantpartlydeformed materials, required the efforts of a spe- materials when thus processed, even though little orcialist. We are therefore very grateful to Dr. Stanley nothing was found in the field.Finney (Oklahoma State University) for 6onating hisservices in these identifications. The advice of Dr. Jack Collecting was hampered by the well developed slatyB. Epstein was invaluable during early stages of the cleavage and the high degree of metamorphism. Therefield work, and in a review of the manuscript. Dr. John is essentially no metamorphism at Harrisburg, Pennsyl-Pojeta CLI.S.Geological Sm'vey) provided ideatifica- vania. The metamorphic grade increases to greenschisttions of some fossil pelecypods. Dr. William B. facies at the Pennsylvania-New Jersey border (Delaware

River), nnd reaches biotite grade at the Hudsun River in Berry (1960, 1976). Rocks of the Jutland area are al-New York (Drake 1970, p. 277). lochthonons, and rewesent an earlier phase of sedimen-

tation wi_ to the deposition of the sediments called

Because many of the specimens axe Weserved as thin Martinsbarg in more northerly areas of New Jerseypyrite films, they weather easily and teacly were seen (Lash and Drake, 1984; Lash and others, 1984). Theexcept on flesh surfaces. However, graptolites were rocks of the Jn/!and Ktippe cori'elate with the Hambargfound in beds that appear to have a higher pyrite con- Klippe in central Pennsylvania and are not part of thetent. In places these beds were stained and weathered Martinsbutg Formation, although they me shown as

differently from the rest of the out,_rop, such on the old New Jersey State Geologic map (Lewisand Kummel, 1918).

PREVIOUS STUDIES

The Martinsburg Formation first was described by Gel- Outside the Jutland area, Weller (1903) described twoget and Keith (1891), and named by Keith (1894) for otbur Ordovician fannas from Sussex County, New Jet-exposures _ Martinsbarg, West Virginia (Drake and sey. In Sussex Born, he relxa-ted a wimarUy shellyEpstein, 1967). The name was first used in New Jezsey fauna, whewats hecollectedagraptolite faunain Frank-by Lewis nnd Kummel (1918) for the pelitic recks lying ford Township (Wellef, 1903. Locality 75B; iocaliry 31between the Middl_ Ordovk:ian Jacksonburg Formation of this report). The fossils were sufficiently identifiableand the Shawangunk Formation of Silm-inn age. The to confhm an Ordovicinn age. The specimens reportedformation name is used for clnstlc rocks and their meta- by Weller from Frsnkford Township were restudied bymoiphic equivalents of Middle and Upper Ordovicinn Ruedemann (1947), but no detailed age conclusions re-age from New York to Tennessee. salted.

Early bioslrafigraphic work in the Ordovician System of Willard (1949) collected a shelly faunule in StillwaterNew Jersey was by Stuart Weller (1903). Although Township, Sussex County, which he attributed to theWeller found tittle fossil matezial in the Martinsburg Eden Stage (see table 1). The specimens apparentlyFoa_nafion, the Jutland area in Union and Clinton Town- have been lost, but the exposure still exists, and hasships, Huntexdon County (fig. 1) was one notable excel_ been reinvestigated as part of the present study (localityfinn where well-presorved graptotites were found in 21). Becrbowex (1956)cited an occurrence of Triar-abundance. The fauna of the Jutland axea, (eunently re- thins beckii Green (lafayette College S-161-2) from afened to as the Jutland Klippe) is described by Pefisso- free-grained sandstone within the Ramseybarg Mexaberrafts and others (1979) and Patris and Crlfiknhank just below the unconformable contact with the overly-(1986). The youngest graptolites from the Jutland ing Shawangunk Formation, in a temporary exposureKtippe correspond to the Nema&raptus gracilis Zone of at the Delaware Water Gap. As the locality is no

Table 1. Graptolitez_aationof theOrdovician MartinsbargFormation.Modifiedfrom RossandBergstrom(1982), Bcrgstromand Mitchell (1989), and Fmney(1986).

LITHOSTRATIGRAPHY BIOSTRATIGRAPHY CHRONOSTRATIGRAPHY

(correlatedto Riva zones) Berry (1960, 1970, 1971) Riva (1969, 1974)

Climacogr_ptus EdcmJan

Pen Argyl Member _ _ raanitoulinesis Climaco_raptusc _ _ spiniferus ............................

"2 _ Climacograpttts

,_ RamseyburgMember _ _- pygmaeus Orthograptus ruedemarmi

.0

_ _ Climaf.o_raptu_ Corynoides wnericanus Sh_naman_ spmgerus

BushkillMember ._ _ Orthograptusruedemanni

_ Corynoidesaraericanus Diplograptus multiden_

Climacograptus bicornis............................

JacksonburgFormation Kirkfieldian

2

EXPLANATION

0 21 Fossil..cogecfinglocality

;E......::" MarSnsburg Formation or

,'::_:::::_"Jutland Sequence

0 5 10 KM

I I t I0 5 MI ""...

-%

MORRISCOUNTY

•J

KEY TO QUADRANGLES

1 Port Jervis South2 Unionville3 Culvem Gap

0 / 11 ", 4 Branchville

WARREN / --- 5 B_shkJll"-',, 6 Flatbrookville<_:. •

COUNTY ..........._:" "_._:_:_...... -," HUNTERDON 7 NewtonWest.::i_:_." /- 8 Stroudsburg...... COUNTY g Poland

:_' ' 10 Blaimtown..J 11 Washington

/'

• _ JutlandS"* :::::::::::::::::::::,:;:;:;:;,.

Figure 1. Map of northwesternNew 3erseyandcontiguous areasshowing distributionof MartiusburgFormationandlocationsof fossil-collection sites.

longer accessible, no further collecting was possible, crihed to the Climacograptus spiniferu$ Subzone of thealthough implications of the find were reconsidered. Orthograptus truncatus intermech'usZone (Ben3,, 1960,This is the same trilobite species that has been re- 1976).ported from the MartinsburgFormation at Swatara

Gap in Pennsylvania (Wright and others 1977; Gerh- Epstein and Berry (1973) collected a graptelite faunaart, 1983). from four localities at Lehigh Gap,Pennsylvania, in the

Pen Argyl Member. The fauna from each locality con-Ben'y (1971) described a graptolite fauna from the rained5 to 7 graptolite species, which correlated withMartinsburgFormation in the Town of Greenville,Or- the Climacograptus spiniferu$ Subzone of the Or-ange County,New York. The localitieswereapparently thograptus truncatus vat. intermedius Zone (Berry,in theRamsoyburg Member(locality 35), and were as- 1970) (table 1).

MARTINSBURG FORMATIONGEOLOGY

Withinthe study area the ManiasburgFormationis cur- biosWatigraphicdata Where the Ramseyburg Memberrently divided into three members: the Bushkill Mem- was seen in contact with the Pen Argyl Member, the

Pen Axgyl member overlies the Ramseyburg. Whereber, a basalshale/slate unit;the RamsoyburgMember,a the PenA.rgylappearsto be overlainby the Ramseyburgmiddle graywacke-bearing unit; and the Pen Argyl Member, it can be shown that the beds are locally over-Member,an uppershale/slate unit. A thoroughdeserip- turned.tion of these members, and a historicaldiscussionof thestratigraphy, was provided by Drake and Epstein Wrightandothers (1979) hased theirtwo-memher inter-(1967). Workin progressby the U.S. Geological Survey pretationon fossil collections made in the areawest ofincludes description of an additional lithostratigraphic the Lehigh River (fig. 2b). Biostratigraphicwork far-unit for the northera part of the area of investiga- ther to the southwest is reportedin Aldrich (1965) andtion (Drake, in press). Stephens and Wright (1981), but is not discussed here

because the three-memherdivision of the MarfinsburgAlthough there are good slratigraphic,pea'ologic and Formationextends southwestwardonly as faras Harris-structural arguments for the current three-division barg, Pannsylvania.MartiasburgFormation (Lash and others, 1984), someworkers (Wright and others, 1979) believe that the" The faunalcollections of Wright and others (1979) cor-Bushkill and Pen A.rgylMembersarethe same unit re- related the Bushkill Member with the Diplograptuspeatedby folding andthrusting.Fossils, notablygrapto- multidens to Orthograptus ruedemanni Zones of Rivalites, occur in all currentor proposed members of the (1969, 1974). Collections from the Shochary Ridge, aMartinsbargFormationand provide a basis fordetermi- sandstoneunit now designated the Shochary Sandstonenation of whether the members are sequential or re- and the New Tripoli Formationby the U.S. Geologicalpeated. Sur,,ey (Lytfle and others, 1986), correlated with the

Orthograptus ruedemanni to Climacograptus spiniferus

The two-memher division was favored by Lesley Zones. The Shochary Ridge sandstone was considered(1892), Lewis and Kummel (1918), Willard (1943), equivalent to the Ramseyburg Member by Wright andWrightand Stephens (1978), Wrightand others (1979), others (1979). Rocks which these authorsinterpretedtoStephens and Wright (1981), and Stephens and others be the Pen Argyl Member (for them, synonymous with(1982). The most significant recent biostratigraphic the Bushkill Member) correlated with theworkin easternPennsylvania is that of Wright and oth- Climacograptus spiniferus Zone near the unconform-ers (1979). able contact with the Silurian Shawangunk Formation,

and with the Orthograptu$ ruedemanni Zone nearShocharyRidge. Lash and others (1984) cited studies

The three-member division has been used by Behre made in New Englandsuggesting that graptolitesmay(1933) and by Drake and Epstein (1967). All geologic be susceptible to facies control (Cisne and Chandlee,mapping by the U.S. Geological Survey in eastern 1982), and argued that the reason the graptolitedataofPennsylvania and northwesternNew Jersey since the Wright and others (1979) did notagree with the three-work by Drake and Epstein (1967) has been based on member division was that, because of facies conirol,the threefold division. Because of the sparse fossil re- their correlations were unreliable. One would expectcord, the three-memberdivision proposed by Drakeand thatif facies cona'olwere important,there would be lit-Epstein (1967) was the result of careful and detailed fie regularity to the datacollected by Wright and othersstratigraphic and structural mapping; they had few (1979). However their dalaa_ to be regular, even if

their inteflneted zone distributions cross lithologic pretationof the area by Lytfle and others (1986), theboundaries(fig. 2). biostratigraphicd_t_ apparently agree with a three-

memberdivision of the Martinsburgformationfollowed

With the map of localities from Wright and others in this report,with the exceptionof thepreviously noted(1979, fig. 2), and the lithostratigraphyfrom the U.S. areato the east of the Lehighriver(fig. 2).Geological Surveymappingprogram(Lash 1982, 1985;Lyttle and othe_rs,1986) as a basis, the correlations BIOSTRATIGRAPHYgiven by Wright and others (1979) agree closely with Graptolite Zones

those of this study. In the areaon the east side of the There are two graptofite zouations cutrentiy in use forLehighRiver, whereWrightand others reported fossils easternNorthAmerica:those of Berry(1960, 1976) andof Orthograptus ruedemanni age from the Pen Argyl Riva (1969, 1974). These two schemes differ somewhatMember (Bushkill Member of their report), there still in theoreticalapproach. Preferencefor one or the otherappearsto be aproblem. Their datacannotbe evaluated generally is determined by one's structural and strati-herebecausethey gave no faunallists foreachsite. graphic interpretationof the Ordovician System in the

eastern United States. The theoretical differences andShocbary ridge is interpretedas a syncfine(Wrightand debatedpoints arewell summarizedby Finoey (1982).others, 1979;Lytfle andDrake, 1979; Lyttle andothers,1986). However Stephens and Wright (1981) andWrightand others(1979) did notrecognize that the syn- Correlationsaregiven here (table 1) according to bothcline is bounded on th.enorthand south by faults (Lyttle zonations, following the published correlationchart ofand Drake, 1979; Lyttle and others, 1986) (fig. 2a), and Ross and Bergstrom(1982) wherever possible.inte_pietedthe area to conformto a two-membersubdi- Faunal Site Descriptionsvision. Wright and others (1979) did not recognize an Locationand faunallists are givenbelow for each site atinlierof the Bushkill Memberexposed on the nerth side which graptoliteshavebeen collected, with a discussionof Shochm'yRidge (fig. 2). The inlier appearsto be the on the correlationof each locality. Some localities con-sourceof the graptofitesof Bushkillage in whatWright lain only shelly fauna,others only graptolites,and sev-andothers (1979) interpretedas the Pen Argyl Member. eral have both. Numbers for the specimens listed,

unless otherwise stated,are New Jersey State MuseumRegardless of the inteqaretafionof the structureand (NJSM) accession numbers for the geological coliec-lithostratigraphyby Wright and others (1979), their fun- tions. This material is available for inspection upon re-ual database is excellent. Based on the stntctaral inter- quest.

Locality 1MartinsburgFormation

BushkillMember

Location: West side of State Highway206 atmilepost 117, approximatelyI kilometer northof janction with CountyRoute519 in BranchvilleBoro, Sussex County.New Jersey(Culvers Gap 7 1/2'quadrangle).

Fauna: Cryptolithus tessellatus Green 12554

Plectorthis sp. 12555

Climacograptus sp. 12678

Correlation: Cryptolithus tessellatus, long considered to be characteristic of the traditional Trenton faunas, is signifi-cant. It is designated as Morphotype A of Lesperanee and Bertrand (1976). The species also has been recorded fromthe Jacksonburg Formationwhich underlies the Bushkill Member (NJSM 6260). Much of the Jacksonburg Forma-tion in this area, along with the Bushkill Member of the MartinsburgFormation, also is assigned to the ShermanianStage, but its graptolite facies equivalents cannot be determined. The Climacograptus bicornis Zone is the mostlikely equivalent for locality 1.

LITHOLOGIC UNITS

I _ Now TripoliLOCATION

(utztown

HAMBURGKLIPPE

N

I0 4I , I , I

_ KmHombur

PalmertonGRAPTOLITE ZONES

CO- Cllmeoograptussplniferue

Or-Orthogreptusruedemannl

Ca-Corynoldes New Tripoliamerlcoeus

Om-DIplograptusmultidens

Ng-Nemegraptuegracllls

N9 Km

BHsmbur Kutztown Allentown West

Figure 2. Geologic interpretation of the Lehigh River area of Pennsylvania; Martinshurg Formation

and associated rocks. A. Lithostratigrsphy (modifiod from Wright and others, 1979 and Lash and

others, 1984). B. Biostratigraphy (graptolite zones, modified from Wright and others, 1979).

6

LocaU_5MartinsburgFormationRamseyburgMember

Location: In the bed of Slate,fordCreek, approximatelyI kilometer upsl_am fTomits intctseclion with State High-way 611, and 100 meters downstreamfrom a small dam, Uppes Mount Bethel Township, Northampton County,Pennsylvania(Stmudsb_g 7 1/2"q_w_'rangl¢).

Fauna: Orthograptas ruedemanni (Gurley) 12846Orthograptus cf. O. ruedemanni 12630 12772 12801 12802 12803 12845

12919 12920

Orthograptussp. 12651 12652 12653 12657

Correlation:Orthograptus ruedemanni Zone.Locafity6

MartinstmrgFormationBushkillMember

Location: Old quan'yin stre.ambedon west side of StateHighway611, approximatelyI kilometersouthof the inter-section of SiatefordCreek and the highway. Upper MountBethel Township, NorthamptonCounty,Pennsylvania.Quarry#28 of Epstein (1970) (Portland7 1/2' quadrangle).

Fauna: Orthograptus sp. 10853 12623 12624 12625 (in part)Glyptograptus sp. 12625 (in part)

Con'elatiun: Uncertain,perhapswithinthe Corynoides americanus Zone. Compm'eto locality20.

Locality 10MattinsburgFcnnationRamseyburgMember

Location: Old quarryon west side of the MiUbrook-BlairstownRoad, apt_aoximately3.2 kilometers south ofMiUlxook, HardwickTownship,WarrenCounty,NewJersey. (FiatbrookviUe7 1/2' q.adrangle).

Fauna: CryptolithuslorettensisFoerste 12714

Crinoidea (colamnals) 11257

Brachiopoda, indeterminate 14472

Con'elaliun: The Cryptolithus specimens, which axean assemblagewithin MorphotypeC (MorphotypeAssociation,III.l) of Lesperanceand Berlrand(1976), are of notablysmall size. The correlationis similarto thatof the SwataraGap fauna(Climacograptus spiniferus Zone of the graptolitefacies).

Locality20MartinsburgFormation

BushkillMember

Location: Roadexlmanreandsmall quarryon south side of MorrisAvenue, approximately1kilometex northeastofits intersectionwith Sussex County Route 655 (Morris Turnpike)and0.7 kilometer south of UnitedStates Highway206, inFrankfordTownship, SussexCounty,New Jersey(Culve_sGap 7 1/2' q_Lqdrangle).

Fauna: Glyptograptus _p 12581

Climacograptus _p. 12584 12585 12663

Diplograptus cf. D. nudt/dens 12659 12660Elles andWood

7

Orthograptus or Glyptograptus sp. 12661 12662 12665

Prolobella corrugata Ruedemann 12629 12664

Con'elation: Correlation with the lower part of the Diplograptus multidens Zone of Riva (1969, 1974) appears likely.

Locality 21Martinsburg FormationRamseyburg Member

Location: Exposure in bank above Flatbmokville-Stillwater Road, just uphill flora a sharp bend in the road at the1080 foot contour, on southeast side of Kittatinny Mountain. Locality previously published by WiUard (1949). Still-water Township, Sussex County, New Jersey. (Flathrnokville 7 1/2' quadrangle).

Fauna: Brachiopoda, cf. Sowerbyella 14473

Brachiopoda, cf. Resserella 14474

Crinoidea (columnals). 14475

Taxa listed by Willard (1949) were cited as:Crinoidea (columnals)

Cornulites sp.

Dinorthis sp.

Sowerbyella rugosa (Meek)

Resserella multisecta (Meek)Cryptolithus bellulus (Ulrich)

The repository of Willard's specimens is unknown.

Con'elation: Although no Cryptolithus sp_imens have been found at the site in recent years, Willard's (1949) identi-ficatiun may be tentatively accepted, although it is uncertain whether his specimens would be considered C. bellulus

by current standards. The specimens from Swatara Gap, now regarded as C. Iorettensis, were considered by someauthorities to be C. bellulus (Whittington, 1968; Epstein and others, 1972). The fauna probably resembled that of lo-cality 10, correlated with the Swatara Gap fauna and with the Climacograptus spiniferus Zone of graptolite facies.

Locality 22Martinsborg Fozmation

Bushkill Member

Location: Embankment on west side of road just north of the intersections of County Routes 521 and 612 in Middle-ville, Stillwater Township, Sussex County, New Jersey (Newton West 7 i/2' quadrangle).

Fauna: GlyptograptuseuglyphusLapwurth 12586 12591 12592 12599 1260412612 12613 12744 12745

Nautiloidea 12590 12596 12563

Prolobella corrugata Ruedemann 12614 12753

Murchisonia sp. 12595

Plectorthis sp. 12589

Gastropoda 12684

cf. Cornulites sp. 12791

Brachiopoda 12747

Pelecypoda 12749

Cr_noidea 12748

Correlation: Glyptograptus euglyphus ranges from the Glyptograptus tereliusculu$ Zone up to high in theClimacograptus bicorais Zone, up to approximatelythe Diplograptu$ multidens zone of Riva, (StanleyFinney, Okla-homa State University, writtencommunication,1985). The shelly formsare similar, if not completely iden6cal, tospecies from the JacksonburgFormation,which underliesthe MartinsburgFormationat locality 22 by less thantenmeters. It appearslikely that this importantfaunabelongs to the C. bicornis Zone of Berryand is only slightly youn-ger than the youngest of the graptolite localities of the Jutland Klippe to the south. It is probablythe oldest faunafrom the MartinsburgFormationin the areaof study and is particularlyimportantbecause it has a shelly faunaaswell as abundantgraptolites.

Locality 26MartinsburgFormation

_, _ BushkiliMember

Location: Road cut on west side of Sussex County Route 610, I kilometersoutheast of milepost 3. at junction withVerdonaRoad, 0.7 kilometernorthwestof State Route 94, Fredon Township, Sussex County, New Jersey (NewtonWest 7 1/2"quadrangle).

Fauna: Orthograptu$ sp. 12628

Correlation:Uncertain,only one specimen is known from the locality. Even one graptofite is unusual, as the lowerMartinsburgFormation is atypicallyverycalcareousatthis exposure.

Locality 27MartinsburgFo_t_ation

Pen Argyl Member

Location: Gully in ihe northwestcornerof the BangorFidelityQuan'y,PlainfieldTownship, NorthamptonCounty,Pennsylvania(Stroudsburg7 1/2' quadrangle).

Fauna: ClimacograptusspinifergsRuedemann 12637 12638 12848Climacograptu$ cf. C. spiniferus 12633 12688 12697Orthograptus sp. 12636 12686 12689 12694

Correlation:This fauna containsabundantgraptolites,but deformation has renderedmost of the Sln_imens unidenti-fmble. It is an especially importantfauna, however, since it is the only one from the Pen Argyl Member within theareaconsidered here. It is the nortbeastemmestfaunaever reported from the member, occun'ingnearthe limit of ex-posure of the lithostratigraphicunit. It seems to correlatewith the Climacograptus spiniferus Zone and is probablyassignable to the Sbermanian Stage.

Locality29MarfinsburgFormationRamseyburgMember

Location: Roadcut on south side of theroadwhich ascends to the upperreservoirof the YardsCreekPumpedStor-age Project,at the level of the 1180-footcontour, BlairstownTownship,WarrenCounty,New Jersey (BushkiU7 lr2'quadrangle).

Fauna: Trilobita, indeterminate 12675

Crinoidea, indeterminate 12674

Con'elation: Uncertain

Locality30MurtinsburgFormationRamscyburgMemher

Location: Outcropson northside of pipelineof the YardsCreekPumpedStorageProject,at level of the fourthcon-

9

crete fotmdationwest of thepicnic parkingarea, BlairstownTownship,Wan'enCounty, New Jersey(Bushkill7 1/2'qnMrangle)

Fauna: Orthograptusquadrinmcronatus(Hall) 12672 12779 12792 12795 12797

Orthograptus calcaratus (Lapworth) 12673Orthograptussp. 12669 12670 12671 12776 12777 12778

Con-elation: The species are long-rangingformswhich of themselvesdo notprovide very specific age information.However,O. quadrimucronatus does not occur in beds as old as the youngestknownocctm'ances of Glyptograptuseuglyphus (Stanley Finney, OklahomaState University,written communication, 1985) which confirms thatthis is ayoungerasseanblagethanthatof locality22. Itmaybe tentativelycorrelatedwith the Orthograptus ruedemanni Zone onthebasis of stratigraphicplacementandfaunalconsistency with locality 5, which is also in the RamseyburgMember.

Locality 31Marinsburg Fcmnation

BushkillMember

Location:Abandonedqum.rynearthetop of hill about 1kilometer northeastof Branchville,New Jersey at 870-footcontour (Branchville 7 1/2' quadrangle). Access is from Fox Hill Road, in Frunkford Township, Sussex County,New Jersey. Locality previouslypublishedby Weller (1903) as his locality75B.

Fauna: Glyptograptus sp. 12667

The faunacitedby Weller(1903) includesthe following species:

Diplograptusfoliaceus (Murehison)

D. angust_folius (Hall)

Lasiograptus mucronatus (Hall)

Corynoides calicularis Nichoisun

Dalmanella testudinaria Dalman

In addition, the following specimens (which probablycame from Weller's original collections) are deposited at theNew JerseyState Museum:

Diplograptus (Lasiograpms) cf. eucharis 10757Dicellograptus smithi 10760

Weller's specimenswere restudiedby Ruedemann(1947), who had made the originalidentifications. The faunal listincludedspecimens from the JutlandKlippeas well as from this locality,thus it is difficult to determinewhich speci-meas came from each area, Italso is difficult to inteq3retthe faunaus givenby WellerandRuedemannwithoutre-ex-aminationof theoriginalspecimens.Unf(ramately,the specimenscanantbe iocaled.

FIer¢are details of thisfauna:

It is unclear what Ruedemann meant by Diplograptusfoliaceus and D. angust_olius (see Ruedemann, 1947).Lasiograptus mucronatus (Hall) would currentlybe considered Hallograptus mucronatus (Hall), said by Riva(1974) to be characteristicof his Diplograptus multidens Zone. Corynoides calycularis (calicularis) rangesfromtheNemograptus gracilis to theCorynoides americanus Zone; it is particularlycharacteristicof the Diplograptusmultidens and Corynoides americanus Zones. Lasiograptus eucharis was said by Ruedemann (1947) to have awide sWatigraphicrange. Dicellograptus is not found in any sites youngerthan the Diplograptus multidens Zoneof Riva.

Con'elation: The most musunable correlation, based on all the information, is an age equivalent to the D. multidensZone of Riv& It appearsthat the original collections were mishandled to some extent, and confusion will result fromany examination or restudy of any materials alleged to have come from this locality. New collections should bewad_ and no correlation is proposeduntil that is done.

10

Locality32ManiasburgFormation

BushldUMember

Location: Road cut on southside of Fmton-GreendeURoad(Sussex County Route 608) about 0.2 kilometer north-westof intersectionwith WintermuteRoad(Sussex County Route519), Fmlon Township,Sussex County, New Jet-sey (NewtonWest 7 1/2"quadrangle).

Fauna: cL Orthograptus sp. 12685

Correlation:Uncertain,faunainadequatefordetermination.

Locality33Martinsburg FormationRamseyburgMember

Location: West side of Matlison Avenue, 0.3 kilometer south of intersectionwith Dennis PhilfipsRoad (turninMattison Avenue roadway) and near Branchville Rese_oir, FrankfordTownship, Sussex County, New Jersey(Brsnchville 7 1/2' quadrangle).

Fauna: Orthograptus sp. (possiblyO. amplexicaulas or O. calcaratus) 12774 12918

Con'elation:Uncertain,faunainsufficientfordetermination.

Locality 34MattinsbutgFcamationRamseyburgMeml_r

Location: Roadcut on south side of Sussex County Route 628 about0.3 kilometereast of the easternend of BonyRoad and west of the junction with Sussex County Route 635, Wanlage Township, Sussex County, New Jersey(Brunchville 7 1/2' q-adrangle).

Fauna: Brachiopoda, indeterminate,andCrinoidea, indeterminate14476

Con'elation: Uncertain,faunainsufficientfor determination.

Locality35MartinsburgFormationRamseybutgMember

Location:Mediandividerof road cut for InterstateHighway84, about4 kilometerseast of PortJervisand 1 kilome-ter east of the rest area in westboundlanes nearthe IGttafinnyMountainsummit in Greenville Township, OrangeCounty, New York (UnionviUe7 1/2"quadxangle).The lithologic unitinformally has been designatedas the "sand-stone at PineBush" (Epsteinand Lyttle, 1987).

Fauna: Brachiop_la, indeterminate 12771

Promopaleaster sp. 12770

This faunawas foundabout 50 meters below the contact with the ShawangankFormation. A previouslypublishedfauna(Berry, 1971) was from approximately30-60 metersbelow the ShawangunkFormation in the same locality.The faunareportedby Berry(1971) containedthe following species:

Climacograptus spiniferas RuedemannClimacograptus typicalis Hall

Dicranograptus ramosas Hall

Orthograptus quadrimucronatus vat. approximatus (Ruedemaun)

11

Correlation:The graptolitesare indicativeof the Climacograptus spiniferus Zone and the shelly faunaprobablyalsofalls within that Zone. _ asteroid genus Promopaleaster also occurs at Swatara Gap,Pennsylvania, which alsocorrelateswith the Climacosraptus spiniferus Zone (Wrightand othea's,1977).

Locality 36MartinsburgFormationRamsoyburgMember

Location: Southside of Yards CreekPumpedStorage Projectpipeline at fourthconcrete foundationnorthof north-west comer of the picnic parkingareaBlairstownTownship, WarrenCounty, New Jersey(Bushkill 7 1/2' quadran-gle).

Fauna: Orthograptus cf. quadrimucronatus (Hall) 12800

Orthograptu$ sp. 12799

Correlation: The bed may be identical with that at locality 30, which is on the opposite side of the pipeline. Thefauna and preservationat both localities arcconsistent. Tentatively, it may be considered a probable correlativeofthe Orthograptus ruedemanni Zone.

Locality 37MartinsburgFormation

Bnshkill Member

Location: Old quarryjust south of WashburnRoad nearcreek crossing and railroadtracks, and along a farm road,MansfieldTownship, WarrenCounty,New Jersey(Washington7 1/2' quadrangle)

Fauna: Plectorthis plicatella (Hall) 14477

Correlation: This is the only faunal locality thus farreported fromone of the Martinsbarg Formationoufliers occur-ring between the main body of outcrops and the JutlandKlippe. The abundantfaunaconsistsessentially of one spe-cies, which also is found in the underlyingJacksonhurg Formation. This would be consistent with a low position inthe section and a relatively early age.

Locality38MartinsburgFormationRamseyburgMember

Location: East side of MountainRoad (Sussex CountyRoute 519), just south of Glen Road intersection,WantageTownship, Sussex County,New Jersey (PortJervis South 7 1/2' quadrangle).

Fauna: Brachiopoda, indeterminate 14478

Crinoidea, indeterminate 14479

Con'elation:Uncertain;faunainsufficientfordetermination.

Locality 39MartinsburgFormationRamseyburgMember

Location: North side of Glen Road, at topographichigh point about midwayalong the road, WantageTownship,Sussex County,New Jersey(Port Jervis South7 1/2'quadrangle).

Fauna: Brachiopoda, indeterminate 14480Crinoidea, indeterminate 14481

Correlation: Uncertain;faunainsufficientfordetermination.

12

Locality 40Martinsburg FonnationRamseyburg Member

Location: West side of Sussex County Route 519, (possibly a quan'y) about 0.4 kilometer south of New York Stateborder in Wuntage Township, Sussex County, New Jersey (Port Jervis South 7 1/2' quadrangle).

The lithologic unit may be the "sandstone at Pine Bush", informally designated by Epstein and Lyttle (1987).

Fauna: Orthograptus quadrimucronatus (Hall) 13838 13839 13840

Con*elation: The fauna is similar to that of locality 30 and the sWatigraphie position is similar. The tentative correla-tion is with the Orthograptus ruedemanni Zone.

OVERVIEW

The new faunal collections from the Martinsburg indicate that the three Martinsburg members correlate with fourgraptolite zones of Riva (1969; 1974). In ascending order, these four are: Diplograptus multidens. Corynoides amer-icanus, Orthograptus ruedemanni, and CIimacograptus spiniferus. An alternative correlation is with theCHmacograptus bicornis and Orthograptus truncatus var. intermedius Zones of Berry (1960, 1970) (table 1). TheOrthograptus truncatus vat. intermedius Zone is now designated the O. amplexicaulus Zone (Finney, 1986). This isthe same age range as determined by Wright and others (1979), although, as previously indicated, the stratigraphicsubdivision differs from theirs. The four zones of Riva are interpreted by him to represent a longer interval than isrepresented by the zones of Berry (Ross and Bergstrom, 1982).

A composite faunal list for each member of the Martinsburg Formation is given in table 2. Table 3 shows graptolitecorrelations for Martinsbur 8 localities.

Table 2. Composite faunal list for members of the Murtinsburg Formation in the study area. (Complete faunal listsfor each locality are given in the text.)

GRAFrOLITEFAUNA

BUSHKILL MEMBER RAMSEYBURG MEMBER PEN ARGYL MEMBER

Diplograptus foliaceus Climacograptus spiniferus C. spiniferusD. angustifolius C. typicalis Orthograptus sp.D. cf. D. multidens Dicranograptus ramosasDicellograptus smithi Orthograptus quadrimucronatusGlyptograptus euglyphus O. quadrimucronatus var. approximatusCorynoides calicularis O. calcaratusClimacograptus sp. O. ruedemanniGlyptograptus sp. cf. O. amplexicaulis, O. calcaratusLasiograptus mucronatusL. cf. eucharis

Orthograptus sp.SHELLYFAUNA

Cryptolithus tessellatus Cryptolithus bellulu$ None foundDalmanella testudinaria C. lorettensis

Plectorthis sp. Dinorthis sp.Murchisonia sp. Sowerbyella rugosacf. Cornulites sp. Resserella multisectaProlobella corrugata Promopaleaster sp.Nautiloidea Crinoidea

Gastropoda Cornulites sp.

13

DISCUSSION

Slrnetmul complexity and discontinuityof outcrops are the Lehigh Rivet (fig. 2), if the structureand sirafigra-majorobstaclesto slratigraphicworkin this area. How- phy of Lytfleandothets (1986) areaecepted.ever, although the stratigraphicposition of individualexposures can rarelybe established with certainty, all Wright and others (1977) reported an extensive shellyout_vopsof the three membersof the Mm_sburg are and graptolitefauna from the MartinsborgFormationatfannnllydistinctivewithinthe studyaxen(table 3). SwataraGap, in centralPennsylvania. The assemblage

correlates with the lower Climacograptus spiniferusThe Bushkill Member consistently coffelates with the Zone of Riva (1974). Its faunal composition suggestsClimacograptus bicornis to Corynoides americanus that it cccrelates with the Ramseyburg Member ofZones. ensternPennsylvania.

The Ramseyburg Member correlates with the Or- Age determinationfor the Pen Argyl Member in thisthograptus ruedemanni Zone to the lowermost part of study agrees with that establishedfor a fauna collectedthe Climacograptus spiniferus Zone. at Lehigh Gap, Pennsylvania(Epsteinand Berry, 1973).

The Pen Argyl Membercorrelateswith the upperpartof The fauna at Lehigh Gap is more extensive than thatthe Climacograptus spiniferusZone, collected at Plainfield Township (27), and was deter-

mined to correlate with the upper ClimacograptusAlthough resolution is inadequate to indicate that the spiniferus Subzone of the Orthograptus truncatus var.Pen Argyl is significantlyyoungerthanthe Ramseybusg intermediu_Zone of Berry(1960).member, it is demonstrablyyounger than the Bushkill

Member. Thus, the Bushkill and Pen Argyl Members Furthercollecting, using the methods of bulk samplingareof differentages and arenotequivalentunits, and microscopicexaminations,should yield even more

The paleontologic data of Wright and others (1979) faunallocalities. It is planned to continue palenntologi-agree with the d_t_ collected for this study, except for cal investigations in the Delaware Water Gap regionthose from some sites in the Pen Argyl Membereast of andothers areencouragedto do likewise.

Table 3. Summary of graptofite correlations forMartinsburglocalities; faunal lists for each locality aregiven in the text.

Locality Member Graptofite Zone27 Pen Argyl Climaco&raptusspiniferus5 Ramseyburg Orthograptus ruedemanni

I0 Ramseyburg Climacograptus spiniferus21 Ramseyburg Climacograptus spiniferus30 Ramseyburg Orthograptus ruedemanni35 Ramseyburg Climacograptus spiniferus40 Ramseyburg Orthograptus ruedemanni

1 Bushlfill Climacograptusbicornis6 Bushkill Corynoides americanus

20 Bushkill Corynoides americanus22 Bushkill Climacograptus bicornis

CONCLUSIONS

Sufficient biusWatigraphicdata nowexist forevaluation dataare inadequate to enable placement of an upperageof the three-memher division of the Martinsbmg Forma- limiton the Pen Atgyl Member.tion currently followed by the U.S. Geological Survey

(Drake and Epstein, 1967). The data demonstrate that The results from this investigation agree well with pub-the lluee_memberdivision is valid. They also show that lished works of Epstein and Berry (1973) and Wrightboth the Pen Argyl (upper Climacograptus spiniferus and others (1977). The new age data agree with thoseZone) and the Ramseyborg Member (Orthograptus of Wright and others (1979) although the resultingruedemanni to lower C. spiniferus Zone) are younger stratigraphicinterpretationdoes not. The structural andthan the Bushlfill (Climacograptus bicornis to stratigraphie interpretations agree with those of LyttleDiplograptus multidens Zone) Member (table 2). The and others (1986).

14

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18