U. 8S. GEOLOGICAL SURVEY 
BULLETIN 845 SHEET 24 
ag 13 
301 
EXPLANATION 
A Sand, gravel,and clay (valley fill) Quaternary 
B Lava and other rocks of volcanic origin Tertiary to Recent 
C  Schist (not everywhere separated) ] piCiabhin 
D Granite f al 
ey 
Geology by N. H. Darton C. Lausen, 
E. D. Wilson, and C. P. Ross 
B 
Columbus Pko) Ly ((C 
Aug) 
Son __ 
(G7 Pass Mtn 
Ces Montezuma 
Ox EL E03 
NE ap, SE 
a VY 70 a4 
pe ees 
amel 
J i620? EL 549 ke: 
ie 1 
ies deres3e 
Pua Caliente 
EL SO. SS : 
“719 MAthel 
Fis 
: / 
N 
+s Vee ad) 
3} ATFs 
Dl Paid a 
” vj alamas 
—-<2r7- 
- 
erase “Oe 
eed f fi 
Xe 
© ee GILLESPIE DAM 
i Py 
SSS. ae 
{ 
Scale 500,000 
linch=8 miles (approximately) 
os 19 15 _____20 MILES 
Each quadrangle sh 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 
Oo bod 10 15 20 KILOMETERS 
Contour interval 200 feet 
in 1s mean sea level 
The distances from New Orleans, La., are shown every 
10 miles, and the ti drawn 1 mile a 
3 
L 
12°30" 
Topography by N. H. Darton, C. Lausen, and E. D. Wilson 
arn errant ne ine vasa 
WILLIAMS & HEINTZ CO. WASH. D.C 
