tiii: 100 mMElHDIAN 
S GEOGKAPIIHAL SURVEYS WEST 
PARTS OF EASTERN k SOUTHEASTERN ARIZONA .WESTERN & SOUTHWESTERN NEW MEXICO- ATEAS SHEET 
We st of Wa ^hington 
Escudilla Peal?; 
# OBJ)PE 
WMM 
I’KAK : | 
iSonibrero: 
OanrpAnf i£e] 
tv-v? f£.Vi>. iujgf 
WiM 
■ ; 
foN a, to n £ s Bi/t CfK-gsfe 
A\l'(j'3;' S' 
U'j.vo' 
m 
C.SanCaii< 
'{jifiJ'V. 
ft fi //J 
WTO* m"C-^vT' 
mmtMM 
AIc.Miilt enipls. 
jgsgSt # 
N\'VRi,,A A| 
? Z. 
ctct/r, o l i / 
Y;$'1:,UX $Ag 
pr|"N 
p Twin Rocks p' & 
Ft.iiavarii 
-;. " 0 ■-' 
S'® 
*3694 
. ■ d 
„sv'y! 
ff'ciffr' 
3485 \ 
HTiitlf 
wN-AOr an iveBiitf^ 
-ira-t-a -Au 
'••--♦ '-'-A y-'-’-r- 
Jfeq.ss. Herntm/t 8 - 1 . any Del.. 
/wired /’coy Jo /S J , 
1st. lieut.Geo Al.Wheeler.Corps of Enqiaet 
EXPEDITIONS of 1071 & 1073 .U nder I lie Command of 
Scale 1 inch to £> miles or i i 5001180 
Quaternary 
Triossic 
(arhonil'cmus 
Silurian 
Archaean. 
Trachyte S'! iliyol i t < ■ 
Basalt 
UI 
BN' ORDER 
, ovrl 
OF 
’HE I [OX ORA 
R 
SECRETARY OF WAR. 
Miles 
mi Ids 
G.K Gilbert, F.E, Howell, Dr. O.Loeiv. Geological 
Assistants. 
UNDER 
DIRECTION OF BRIG.GEN A.A.RPMPIIREYS AIDER OF ENGINEERS U.S. ARMY 
C .Borne 
A 
