DEPARTMENT  OF  THE  INTERIOR 
UNITED  STATES  GEOLOGICAL  SURVEY 
GEORGE  OTIS  SMITH,  DIRECTOR 
'Bulletin  300 
PRE-OAMBRIAN   GEOLOGY   OF 
NORTH  AMERICA 
Clemso-  Collej 
P^emme^  Pub.--  ■< 
BY 
CHARLES  RICHARD  VAN  HISE 
AND 
CHARLES  KENNETH  LEITH 
WASHINGTON 
GOVERNMENT     PRINTING     O  F  F  I  C  B 
1909 
