U.S.  GEOLOGICAL    SURVEY. 
^kJu^^w^M  i,vi 
C.Mique] 
59 
58 
57 
Unclassified  Pre-Camb  Algonkian 
^U  CZj 
Algonkian 
__J 
GEOLOGICAL  MAP 
SHOWING  PBE-CAMBR1AN 
Compiled  from 
r       ScaU 
