U.S.  GEOLOGICAL   SURVEY 
BULLETIN   86    PL    IX 
Unclassified  Pre-Camb.  Algonkian 
Post-Algonkian 
Granite 
LZZ] 
GEOLOGICAL  MAP  OF  PORTIONS  OF  COLORADO  AND  NEW  MEXICO 
SHOWING  PRE-CAMBRIAN  ROCKS 
Compiled  from  the  King,Hayden  8  Wheeier  Reports 
Scale    574so.odo 
