U. S. GEOLOGICAL SURVEY 
BULLETIN 845 SHEET 13 
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EXPLANATION 
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102°30° 102° Texas 
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le 500,000 
linch=8 miles (approximately) 
5 10 15 ___20 MILES 
: slp fe} 5 10 15 20 KILOMETERS 
ey, lath tte, PeLLIOLK 
Os fein ‘ ELLL DY 4 Contour interval 200 feet 
eg aN Oriea 
OZ4 J ; p ur | Ny w4ne The distances from New Orleans, La., are shown every 
BAS “fe 10 miles, and the ti drawn 1 mile apart 
Q72I 
Sheet 12 
A Sand and gravel 0-80’ nary 
B Limestone and clay Eagle Ford > Upper Cretaceous 
(overlain by Austin chalk) (Gulf series) 
Limestone uda 
Cc 4Clay, yellow Del Rio Washita group 200’ | Lower Cretaceous 
Limestone Georgetown (Comanche series) 
D Limestone Fredericksburg group 700’ 
Geology by N. H. Darton, 1927 
102.30° 102° 
"Topography in part from maps by U. S. Army Corps of Engineers 
and by U. S. Geological Survey, and in part by N. H. Darton 
WILLIAMS & HEINTZ CO. WASH..D.C 
