U. 8S. GEOLOGICAL SURVEY BULLETIN 845 SHEET 9 
96.30! os Texas 
EXPLANATION 
A Sand, gravel, and clay (alluvi dt deposits) 0-210’ Quaternary 
(only the larger areas shown) : ell 
B_ Sandstone Carrizo 80-400’ as roel 
C Sandstone, shale, some sandy is. Indio 600-800’ f (Pocens) LES 
D Shale, with thin sandstone Midway 0- 300’ J (/ 
E Shale, mostly dar' Navarro + ea 
F Shale, mostly dark Taylor 400-500’ | Upper Cretaceous O 
G Chalk Austin 300-400’ | (Gulf series) @ 
H_ Limestone Eagle Ford 10-30’ a 
| { Hiner, hard, massive Buda 55-65’ | (| 
Clay, yellow Del Rio Washita group 50-70 \. \\ 
J Limestone, massive Georgetown +: | Lower Cretaceous va a 
< meen monty elie: Camanche ra Predeickburg, 400-600" [ (Comanche serie 
Cla Walnut group 
L. Limestone, impure, yellowish Glen Rose} Trinity group 800'* | 
~ Fault Geology by L. W. Stephenson, Julia Gardner, E. H. Sellards, 
Consaled tasks R. L. Cannon, N. H. Darton, and others 
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Se ‘00, 
linch=8 miles (approximately) 
5 10 15 20 MILES 
0 5 i?) iS 20 KILOMETERS 
SSS _ Yacon romaine 
Contour interval 50 feet 
The-distances from New Orieans, la, are shown every 
10 miles, and the crossties are drawn 1 mile apart 
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in the lower left corner is mapped in detail on the U.S. @. 8. 
topographic map of that name 
30° oe 
Topogr ‘aphy in part from maps by U. S. Army Corps of Engineers | _ WILLIAMS & MEINTZ CO., WASH. D.C 
and by U. S. Geological Survey, and in part by N. H. Darton 
