U. S. GEOLOGICAL SURVEY BULLETIN 845 SHEET 12 
101°30° . 101° 
Texas 
1 
Scale 500,000 
linch=8 miles (approximately) 
5 10 15 
20 MILES 3d 
@ 
O, 
fe} 5 10 i5 20 KILOMETERS 
Contour interval 100 feet 
* pian 
~ ‘Ce The distances from New Orleans, La., are shown every 
3 ee % 10 miles, and the crossties are drawn J mile apart 
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EXPLANATION O 
A Gravel and sand (alluvium and high terrace deposits) Quaternary 
B Limestone, chalky Austin chalk Upper Cretaceous 
Limestone, impure, slabby Eagle Ford (Gulf series) 
Limestone, massive Buda t \* ¢ 
Clay, yellow (absent west Del Rio ‘ s ay (74 
of longitude 101° 22’) Washita group |; ower Cretaceous Vite heake 1 eA 
. p ‘ (Comanche series) ) WARE 
D Limestone, massive Georgetown : ; 
i ¥ 
E Limestone Fredericksburg group j N 
Geology by N. H. Darton y) 
A 
WILLIAMS @ HEINTZ CO. WASH. 9. C. 
