Bulletin No. 251 
Rpriw i A ' Economic Geol °gy» 44 
aeries j ^ Descriptive Geology, 55 
DEPARTMENT OF THE I NT 1 IK 
UNITED SPATES GEOLOG: 
CHARLES 1). WALCOTT, 
OF THE 
FOETYMILE, BIRCH CREEK, AND FAIRBANKS 
REGIONS, ALASKA 
BY 
LOUIS M. PRINDLE 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1905 
