EA
STB
ATO
NROUGE
PARISH
LIVING STO N PARI SH
EAST BATON ROUGE PARISH
LIVINGSTONPARISH
CENTRAL
ADE H MSPRINGS
N
GreenwellSprings
PlainviewMagnolia
Watson
The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government or the state of Louisiana.
This map has been carefully prepared from the best existing sources available at the time of preparation. However, the Louisiana Geological Survey and Louisiana State University do not assume responsibility or liability for any reliance thereon. This information is provided with the understanding that it is not guaranteed to be correct or complete, and conclusions drawn from such data are the sole responsibility of the user. These regional geologic quadrangles are intended for use at the scale of 1:24,000. A detailed on-the-ground survey and analysis of a specific site may differ from these maps.
SCALE 1:24,000
Base map from U.S. Geological Survey 1:24,000 GeoPDFUniversal Transverse Mercator Projection, Zone 15
North American Datum 1983 (NAD 83)Contour Interval 5 Feet
National Geodetic Vertical Datum 1988
Watson 7.5 Minute Geologic QuadrangleOpen File Series 2016-04
Chacko J. John
Director & State Geologist
APPROXIMATE MEANDECLINATION, 2016
0o 06’ E
1000 500 0 METERS 1000 2000
21KILOMETERS00.51
1 0.5 0
MILES
1
QUADRANGLE LOCATION
LOUISIANA
Gr a
ys C
r
3 30°
94 7
FEET
95
93
93 01
78
00'
30"
81
99
7
33
33
6
33
30"00
30"57'
86
83
35'
XP
30°76
33
3
33
91°
30°
35'
78
32'
79
84
94
85
6
7
33
6
33
33
6 03
76
87
83
37'
89
96
77
30"
N
00 7
33
730
33
33
52'
52'
30"
82
97
32'
30"90°
91°
30°
95 98
84
82
85
88
55'000m
02
77
000
000
55'30'
90°
66
33
33
33
6
33
33
33
33
33
6
000m
6
37'
80
87
99
80
YP03
YP
86
81
88
98
33
33
6 7
7
420 FEETE
57'FEET
00'
30"
01
79
N
97
33
000
33
XP
30"
390
770
FEET
02
30'
92
33
6
000m
7
33
E6
000
6
000m
33
SCALE 1:24 000
7.5 MINUTE GEOLOGIC QUADRANGLE SERIESWATSON, LOUISIANA
Produced and published by the Louisiana Geological Survey3079 Energy, Coast & Environment Building, Louisiana State UniversityBaton Rouge, LA 70803 • 225/578-5320 • www.lgs.lsu.edu
This geologic map was funded in part by the USGS National CooperativeGeologic Mapping Program under StateMap award number G15AC00247, 2015.
Copyright ©2016 by the Louisiana Geological Survey
Geology by: Richard P. McCulloh and Paul V. Heinrich
GIS Compilers: R. Hampton Peele, Richard P. McCulloh, and Paul V. Heinrich
Cartography by: Robert L. Paulsell
Beav
erCr
Moler
Bayou
Spillers Cr
San d y Cr
Colton Cr
Beav
erBr
W Colyell Cr
WCo
lyel
l Cr
Amit
eR
iver
Amite River
Amite River
Sandy Creek
Amite
R
iver
W Colyell Creek
Amite River
QUATERNARY SYSTEM
HOLOCENE
Holocene undifferentiated alluvium—Undifferentiated deposits of small upland streams: unconsolidated alluvial deposits of minor streams and creeks filling valleys incised into older deposits, with textures varying from gravelly sand to sandy mud.
PLEISTOCENE
LOESS—Eolian silt veneer of late Wisconsin age (Peoria Loess) mantling Pleistocene and older strata. Underlain in places by older loess of possible late Sangamon to early Wisconsin age (Sicily Island Loess). Loess is shown where the total thickness of either or both loess units is 1 meter or greater.
PRAIRIE ALLOGROUP
Hammond alloformation—Deposits of middle to late Wisconsin coastal-plain streams in the Florida Parishes of southeastern Louisiana. It consists of grayish silty clay to very fine to medium sand, with abundant ferromagnesian nodules (≤ 2 cm) in places, and in the northern Pride to western Watson 7.5-minute quadrangles is covered by 1 m or more of Peoria Loess.
Open Water
Contact—Includes inferred contacts.
Approximately located fault—Identity and existence certain, location approximate. Ball and bar on downthrown block.
Concealed fault—Identity and existence certain, location concealed. Ball and bar on downthrown block.
Roads and Railroads
Streams
Topographic Contours
References:
Loess distribution based on:
Miller, B. J. (compiler), [1983], [Distribution and thickness of loess in Baton Rouge, Louisiana 1 × 2 degree quadrangle]: Louisiana State University Department of Agronomy, Louisiana Agricultural Center, Louisiana Agricultural Experiment Station, Baton Rouge, unpublished map, Louisiana Geological Survey, scale 1:250,000.
Description of Map Units
Hua
Pph
Hol
ocen
eP
leis
toce
ne
Southeast Louisiana Coastal Plain
Hua
Pph
Peoria Loess
Correlation of Map Units
Hua
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Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
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Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Hua
Pph
Pph
Pph
Pph
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Pph
Pph
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Pph Pph
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PphPph
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Pph
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