DEPARTMENT OF NATURAL RESOURCES 

 WARREN T. HANNUM, Director 



STATE OF CALIFORNIA 

 EARL WARREN, Governor 



DIVISION OF MINES 



Ferry Building, San Francisco 11 



OLAF P. JENKINS, Chief 



San Francisco] 



BULLETIN 141 



[September, 1948 



GEOLOGIC GUIDEBOOK 

 ALONG HIGHWAY 49SIERRAN GOLD BELT 



THE MOTHER LODE COUNTRY 



(CENTENNIAL EDITION) 



Prepared under the direction of 

 OLAF P. JENKINS 



CHARLES V. AVERILL 

 OLIVER E. BOWEN, JR. 

 JOHN A. BURGESS 



Contributing Authors 



RICHARD A. CRIPPEN, JR. 

 DONALD C. CUTTER 

 FRANKLIN FENENGA 

 ROBERT F. HEIZER 



DOROTHY G.JENKINS 

 OLAF P. JENKINS 

 CLARENCE A. LOGAN 



