MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITYOFFICE OF GEOLOGY SURFACE MAPPING DIVISION

MISSISSIPPI GEOLOGICAL SURVEYPrepared in cooperation with

THE UNITED STATES GEOLOGICAL SURVEYNATIONAL GEOLOGIC MAPPING PROGRAM

GEOLOGIC MAP OF THE 7.5-MINUTEGIN BRANCH QUADRANGLE

OPEN-FILE REPORT 298

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Gin Bra n ch

WINFIEL D ROAD

PERT H ROAD

FOUNT IAN ROAD

OL D HIGHWAY 28 ROAD

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90°53'45"W

90°53'45"W

90°55'W

90°55'W

90°56'15"W

90°56'15"W

90°57'30"W

90°57'30"W

90°58'45"W

90°58'45"W

91°0'W

91°0'W

31°45'N 31°45'N

31°43'45"N 31°43'45"N

31°42'30"N 31°42'30"N

31°41'15"N 31°41'15"N

31°40'N 31°40'N

31°38'45"N 31°38'45"N

Pliocene

Miocene

Tertiary

Holocene

Pliestocene

Qua tern ary

Unconformity

Unconformity

Unconformity

Unconformity

Qal

Ql

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S a n d, m edium - to b rown ish-white, very fin e- to very coa rse-gra in ed, _ _ _ _ _sub roun ded to roun ded, predom in a tely qua rtzose, silty, cla yey; com m on ly con ta in s orga n ic m a tter; hea vily loess derived with occurren ces of gra vels eroded from terra ce deposits. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Descriptionsof

Map Units

Copyright © 2020 Mississippi Department of Environmental Quality, Office of Geology

Reference Scale: 1:24,000

Contour Interval: 20 Feet

1 0 10.5Miles

1,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000Feet

1 0 10.5Kilom eters

O-0001

U n con form a b le Con ta ct

L in e of S ection

Drill-hole loca lity a n d iden tifica tion n um b er

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ALLUVIUM

HATTIESBURG FORMATION

LOESS

An cestra l Ten n essee-Ohio River S ystem terra ce deposit. S a n d, yellow, ora n ge, purple red, pin k, fin e- to coa rse-gra in ed, predom in a n tly qua rtzose, cross--b edded to m a ssive; gra veliferous, pea to cob b le size (n o m ore tha n 3 in ches) predom in a tely chert with lesser a m oun ts of vein qua rtz, m eta qua rtzite, a ga te, a n d sa n dston e; cla y pin k to white, gen era lly occurrin g a s discon tin uous len ses in the upper portion s a n d a s rip-up cla sts in b a sa l portion s. Con glom era tic iron ston e ledges a re com m on in the gra veliferous sa n ds a t the b a se of the form a tion , which overlies the Ha ttiesb urg Form a tion un con form a b ly. At a pproxim a tely 500 feet MS L , the form a tion fin es to a b rown to reddish-b rown silt loa m tha t often con ta in s a ha rdpa n which con sists of a m in era lized horizon of iron -m a n ga n ese b uckshot n odules. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

BROOKHAVEN TERRACE

LOW TERRACE DEPOSITSS trea m T erra ce - S a n d, ora n ge to ta n colored, fin e- to coa rse-gra in ed,predom in a tely qua rtzose, cross-b edded to m a ssive; gra veliferous, pea -to cob b le-size, predom in a n tly chert a n d m ilky qua rtz; cla y, ka olin itic, pin k to white, gen era llyoccurrin g a s discon tin uous len ses. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

T. 9 N.

T. 8 N.

T. 9 N.

T. 8 N.

R. 2 E. R. 3 E.

R. 2 E. R. 3 E.

Correlation of

Map Units

¬This geologic map was funded in part by the U.S. Geological Survey, NationalCooperative Geologic Mapping Program, under STATEMAP award numberG19AC00234.MDEQ-GEOL OGY Geogra phic In form a tion S ystem s: Da n iel W. MorseMDEQ-GEOL OGY Drillers: Archie Mcken zie a n d T rey Ma geeMDEQ-GEOL OGY Geophysica l L oggin g: An drew Newcom b a n d Pa ul Pa rrishGeologic maps are only a guide to current understanding and do not eliminatethe need for detailed investigations of specific sites for specific purposes. Theviews and conclusions contained in this Open-File Report are those of thegeologists and should not be interpreted as representing the official policies,either expressed or implied, of the State of Mississippi or of the United StatesGovernment.

Adjoin in g 7.5' Qua dra n gles

L orm a n RedL ick McBride

Fa yette GinBra n ch

U n ionChurch

Roxie Kirb y Eddicetown

Base Map produced by the Mississippi Geological SurveyCoordinate System: WGS 1984 Web Mercator Auxiliary SphereProjection: Mercator Auxiliary Sphere; Datum: WGS 1984; Units: MeterDeclination: June 01 2020, magnetic north declination in quadrangle center is 0°37' West of true north,changing by 0°6' west per year.Lidar: Mississippi Department of Environmental Quality (MDEQ), U.S. Army Corps of Engineers (USACE),United States Geological Survey (USGS), Natural Resources Conservation Service(NRCS), FederalEmergency Management Agency(FEMA), National Oceanic and Atmospheric Administration(NOAA),National Park Service (NPS), and Tennessee Valley Authority (TVA). Project span 2005-2017.Hydrography: Lidar derived; National Hydrography Dataset (NHD) 2020Contours: Lidar derivedRoads: Mississippi Department of Transportation (MDOT) 2018PLSS Boundaries: Mississippi Automated Resource Information System (MARIS) 2020Building Footprints: Microsoft 2019Surface Mines: MDEQ Office of Geology - Mining and Reclamation DivisionBoreholes: MDEQ Office of Geology - Environmental Geology Division

2020

GEOLOGIC MAP of the GIN BRANCH QUADRANGLEJefferson County, Mississippi

Geology byJonathan R. Leard, GIT and

James E. Starnes, RPG

Cla y, green , gra y, b rown , wea thers white to b rown , silty to sa n dy, loca lly lign itic; sa n d, gra y, pa le yellow to white, fin e-to coa rse-gra in ed, cross-b edded to m a ssive with ra re thin ly b edded pea gra vels (gra vels con sist of b la ck chert a n d m ilky qua rtz, a re highly polished, sub -a n gula r to well roun ded), often in dura ted to sa n dston es a n d siltston es a t surfa ce, predom in a n tly qua rtzose with lesser a m oun ts of chert, m eta qua rtzite, m ica , a n d hea vy m in era ls, slightly gla ucon itic in pla ces, silicified a n d coa lified wood com m on . T he b a se of the Ha ttiesb urg Form a tion is design a ted a t the b a se of a sa n d un it of region a l exten t tha t occurs a t the a pproxim a te horizon of the b a se of the Flem in g Form a tion in L ouisia n a a n d the m iddle-Miocen e Am os S a n d in Ala b a m a .

S ilty, b uff to ta n , pa le yellow, red, gra y-green where in a n oxic con dition s; qua rtzose to feldspa thic. L oess is a n Eolia n deposit derived from gla cia l outwa sh. L oess is typica lly ca lca reous with dolom ite a n d ca lcite; however, the upper portion of the loess is highly wea thered, lea ched/n on ca lca reous, cla yey, a n d ha s b een referred to a s “b rown loa m .” L oess deposits un con form a b ly b la n ket the Pre-loess topogra phy with sub sta n tia l loca l va ria tion in thickn ess. In pla ces, wea thered loess con ta in s secon da ry deposits of sm a ll ca lca reous con cretion s of ca liche loca lly referred to a s loess dolls. L oess ca n b e loca lly a n d spa rin gly fossiliferous, com m on ly con ta in in g tests of stein kern s of pulm on a te ga stropods a n d less com m on ly con ta in in g fossils of Pleistocen e Verteb ra tes.

Tha

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Winfield Road Perth RoadPerth Road

PerthRoad

Perth Road

Perth Road

Perth Road¬«28 ¬«28

AlluviumAlluvium

AlluviumAlluvium

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O-0001Mississippi Bureau of Geology

Easley Drilling Co. - Elijah GlassSec.16.-T.8N.-R.2E.

Elev.480ft. T.D.282ft.

Structural Cross-Section of the Gin Branch 7.5-Minute Geologic Quadrangle

Middle Fork HomochittoRiver

Vertical Exaggeration X20

HATTIESBURGFORMATION

BROOKHAVENTERRACE

BROOKHAVENTERRACE

0 2 41Miles1:26,000

Sea Level Sea Level

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Feet600

Feet600

0 1 20.5Miles

1 in ch = 5,000 feet1:60,000

Ba re Ea rth Hillsha de derived from NRCS /MDEQ/3DEP 2016 2017 : S outh West Mississippi project