Beach _ shingle and recent accumulatons, 
NewRiver and L 7 s. 
Leva ol Fb: "es 
N 
RR 
^ 
$ 
= 
Pe 
EN 
TS 
s 
Sn 
X 
\ 
E 
sc 
MCN 
Te 
KI ee 
X 
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x à X 
| 1 | Alluvial Deposits. Ai nd Gneissose, Metamorphic. * 
2 
DUE 
a SEDE:‏ ور د 
ZA Y] Fertiory Strata and Oc Compact Granite .‏ 
Cretaceous? r ^‏ : 
Mirupted Greenstone. 
: zd : 
Granite veins. 
ند 
Gnessose Rocks, traversed by enormous 
Feldspathie veins, and highly contorted . 
p". 
\ 
\ 
Ww 
l 
NINN 
NON 
Qr ۱ 
L ۳ O R A D 0 D E S E 
E 
rd ^ 
à E Upper plain of the Desert covered with polished pebbles and drifting sand 
U.S.PACIFIC RAIL ROAD EXPLORATIONS & SURVEYS 
WAR DEPARTMENT 
GEOLOGICAL SECTION 
FROM THE 
: ۱۱۷ 7 
COLORADO RIVER To THe PACIFIC OCEAN 
Explored by Lieut R.S WILLIAM SON Corps of Topl Bing? faeit Brale 
1553 d 
Constructed from observations in the vicinity of the route from the mouth of the Gila river p 一 cu E EIER SERIE a a 
Over the Colorado Desert and the Peninsula Sierra to San Diego via Carrizo CreekVallecitos, -一 十 - Sea PCM Sa — لس سس‎ 
an Felipo Warners Pass, Santa Isabel and San Pasquale pd 
Prepared in the Office of Pacific Rail Road Explorations « Surveys. x ee | des 
War De tment i Vertical Seale 
ByWilliam i P Blake. 9 Prati TORT ? A ren 3 "m سب تسب‎ es 
eds of angular frag. 
‘Fort Yuma. 
Colorado and Gila Rivers 
