N MS Geology by Charles T. Swann, R.P.G. Mississippi ...Geology by Charles T. Swann, R.P.G....

Geologic map of the Walnut, Miss.-Tenn., 7.5' QuadrangleGeology by Charles T. Swann, R.P.G.Mississippi Mineral Resources Institute

2002

SCALE; 1:48,000

0

0

1 Mi.

1 Km

N

Projection is Transverse Mercator

MS

U

D

Tpc

Qal Sand, silt, clay: flood plain deposits associated withexisting fluvial system

Porters Creek FormationClay: micaceous, locally silty, massive to laminated,conchoidal to blocky fracture, spiculitic, sparse bivalvefossils; becomes sandy, glauconitic, bedded in lowerpart of section; becomes massive upon weathering

Fault: Approximately located;upthrown and downthrownblocks indicated by "U" and "D"

UD Fault: Measured location

Ter

tiary

Qua

tern

ary

Owl Creek FormationClay, silt, sand: typically silty clay, sandy, verymicaceous, fossiliferous; sand beds fine-grained, thin;unit often carbonaceous at top; weathers to sandy clay

Axis of anticlinal feature

Hydrocarbon well - dry hole

Clayton Formation; Chalybeate MemberSand: medium- to fine-grained, poorly bedded, minorclay beds, fossiliferous; at base is discontinuouslimestone, glauconitic, phosphatic, fossiliferous; upperunit weathers to massive argillaceous sand; entireunit assigned to Chalybeate Member

Cre

tace

ous

Tcl

Koc

LEGEND

Unconformity

Tmr Meridian SandSand: medium- to coarse-grained, cross-bedded, minorclay beds, silicified wood locally common

Tna Naheola FormationSand, clay, lignite: sand beds typically medium-grainedand argillaceous, may be well sorted, may locally contain granules; clays are gray to yellowish-gray, thinly beddedto laminated; base is locally channeled and may containangular clay boulders, often has a "mealy" texture

R 3 E R 4 E

R 3 E R 4 ET

2 S

T 1

S

T 2

ST

1 S

15

15

HOLLY SPRINGS NATIONAL FOREST

ILLI

NO

IS C

EN

TRA

L G

ULF

RA

ILR

OA

D

WALNUT

72

72

354

101

301

301

Brownsfield

Tiplersville

UU

U

U

U

D

UD

U

U

D

D

D

D

D

D

Tpc

Tpc

Tpc

Tpc

Tpc

TpcTpc

HARDEMAN CO.

TIPPAH CO.TENNESSEE

MMRI-MartindaleNo. 1

MISSISSIPPI

Tpc

Tna

Tna

Tna

Tna

Tna

Tmr

Tmr

Tmr

Tmr

Tmr

Tmr

Tmr

Tmr

Qal

Koc

Tcl

Tcl

Tcl

CR

EE

K

MU

DD

Y

CR

EEK

CREEK

CREEK

BRANCH

BR

AN

CH B

RA

NC

H

YO

PP

DRY

BIG

CR

EEKMIX

BRANCH

CANE

BRANCH

WA

TKIN

S

BRANCH

BRANCH

PRESSLEY

SOUTH

NO

RTH

SPICEWOOD

HURRICANE

CREEK

CREEK

BLUFF

MU

DD

Y

TURKEY

BRU

SHD

RE

WE

RY

CR

EE

K

CR

EE

K

CREEK

Smackco Ltd.,Blackwell No. 1

MemphisEquiptment Co.,Melton No. 1

RE

GIS

TERED PROFESSIONAL GEO

LOG

IST

CHARLES T. SWANN

THE GR

EA

T S

EAL O

F THE STATE OF M

ISSISSIPPI

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