U. 5. GEOLOGICAL SURVEY 



PROFESSIONAL PAPER NO. 20 PL. IX 



A. ARCTIC COAST AND EDGE OF MOSS-COVERED ARCTIC COASTAL PLAIN. 

 From west of Colville River; looking S. 45° E, 



B. SKAGIT LIMESTONE ON JOHN RIVER IN ENDICOTT MOUNTAINS. 

 Looking S. 65° E. 



