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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
MS0003