U. S. GEOLOGICAL SURVEY BULLETIN 845 SHEET 26 
Oo o o 
115 30 W5 Fg ee cee ie PE 
Sa CARS 
} 2 
] EXPLANATION 
= A Sand and gravel Quaternary 
Acer B Sandstone, clay and gl t LG Pliocene 
3 C Lavas and other rocks of Tertiary 
voleanic origin (undifferentiated) 
Be> D Schist and granite Pre-Cambrian and later 
ee <a Geology, reconnaissance by J. S. Brown, 1917-1918 
+> Va 
ie d / 
7, ci 
Woe Rw 
i G Aa? GS 
Flowing Well 7’ SSS PO! Gy — 
, °\ Te c LS) wf? 160i 
1810 Iris > Sst : : 
PAY MASTER 
/ 
4 
Estelle 
2277 
Calipatria 
Imp 
2z -4 
\\0 
e aS 
( 0 Scale 500,000 
Calexico linch=8 miles (approximately) 
ene -5 10 15 
r exicali 
ce] Lo i) i} 
Contour interval 200 feet 
mM 13 mean see feve/ 
The distances from New Orleans, La., are shown every 
10 miles, and the crossties are drawn 7 mi 
in the lower left corner is mapped in detail on the U. S. G. S. | 
topographic map of that name oe era 
530° SS WS 
Topography from U. S. Geological Survey uadrar zh map WILLIAMS & HEINTZ CO., WASH. D.C 
