U. S. GEOLOGICAL SURVEY 
BULLETIN 845 SHEET 15 
1 
Scale 500,000 
linch=8 miles (approximately) 
s 10 iS 
19) 20 MILES 
i] 10. 15 20 KILOMETERS 
Contour interval 200 feet 
Datum 1s mean sea /eve/ 
The distances from New Orleans, La., are shown every 
10 miles, and the crossties are drawn 7 mile apart 
dt r? 
Each q g on the map with a name in parentheses 
in the lower left corner is mapped in detail on the U. 8. G. 8. 
topographic map of that name 
*) 
° 
~ 3 Fi 104 30 104 Texas 
- IF , F J, {s 
oS 5 K LA, 6 £9 EXPLANATION 
= ONE YEDDA 
te SS PROS - A Sand 1, ete. (valley fill 0-500’ 
</o os “2%, & BA - : , gravel, ete. (valley fill) Quaternary 
Chyspa ~~ —  & 2 be 400 Lavas and other rocks of 100-1,200’ = Terti 
) CRIB De <4 Lf, / a A. voleanic origin poh 
AA La Z erage volcanic tuffs, 
WW Chispa >: ee: (Gu serve) a 
ve Shale 
MOA Sandst limest Trinity group 180’+ oo S “4 
Ble Mtn 
VV 
(Comanche series) 
300’+ Permian 
Geology: reconnaissance by N. H. Darton 
of “8 
“oy 
10430 
Topography: U. S. Geological Survey quadrangle maps 
WILLIAMS & HEINTZ CO.. WASH..0.C 
