ROCKY MOUNTAIN STRUCTURE IN IDAHO 459 
135° 
R42E. 
Ho Coens seh 
cocos, 
- 
A ~ 
f ~ 
Sugarloaf Min 
eee 
“x, : ; I] 
“Pothetical structure 
1 Yn (9) 1Mile 
——- 
EXPLANATION 
QUATERNARY CRETACEOUS 
Alluvium Hill-wash and older Wayan formation 
alluvium Inclu ing Homer limestone 
QUATERNARY? TERTIARY 
Ss 
atTSS7S y ~ 
EG 
Basalt Andesite — Dikes  Strikeanddip 
Fic. 8.—Map with geologic structure section of the Sugarloaf district, Cranes 
Flat quadrangle, showing an inverted fan fold. 
