Professional Paper No. 20 



Series / A ' Eo(momio 

 6enes \ B, Descriptii 



ive Geology, 34 



DEPARTMENT OF THE INTERIOR 

 UNITED STATES GEOLOGICAL SURVEY 



CHARLES D. WALCOTT, Director 



A 



RECONNAISSANCE IN NORTHERN ALASKA 



ACROSS THE ROCKY MOUNTAINS, ALONG KOYUKUK, JOHN, 



ANAKTUVUK, AND COLVILLE RIVERS, AND THE 



ARCTIC COAST TO CAPE LISBURNE, IN 1901 



BY 



FRANK CHARLES SCHEADEE 



WITH NOTES BY 



W. J. PETERS 



a- 



W ASHING TON 



GOVERNMENT FEINTING OFFICE 



1904 



iTm 



