GLACIATION ON THE NORTH SIDE OF THE 

 WRANGELL MOUNTAINS, ALASKA^ 



STEPHEN R. CAPPS 



Since the pioneer trip of Lieutenant Henry T. Allen, in 1885, it 

 has been known that a range of mountains lying north of the Chisana 

 River, and later called Wrangell Mountains,^ was heavily glaciated. 

 The glacial phenomena of the Copper River basin and the south 

 side of this range have been more or less fully discussed by various 

 writers,^ and some notes have been published^ on the occurrence and 

 position of glaciers and of Pleistocene deposits on the north side of 

 this range, and in the White River Valley. During the summer of 

 1908, it was the writer's privilege to take a trip into the region north 

 of the Wrangell Mountains with a party from the U. S. Geological 

 Survey, in charge of Mr. Fred H. Mofht. The attempt is here made 

 to summarize the glacial conditions of this region. In certain 

 portions not personally visited, the unpubhshed maps and notes 

 of F. C. Schrader, collected in 1902, have been drawn upon. The 

 names of rivers, mountains, etc., referred to are taken from the topo- 

 graphic maps of the U. S. Geological Survey. ^ 



The dominant topographic feature of the region under discussion 

 is the Wrangell Mountains, extending from the Copper River basin 

 in a southeastern direction to Russell Glacier and the headwaters of 



1 Published by permission of the Director of the U. S. Geological Survey. 



2 F. C. Schrader, 20th Ann. Rept., U. S. Geological Survey, Part VII, pp. 377, 378. 



3 F. C. Schrader and A. C. Spencer, Geology and Mining Industry of a Portion of 

 the Copper River District, Alaska, 1901, p. 30; C. W. Hayes, Nat. Geog. Mag.,Yo\. IV, 

 1892; Oscar Rohn, 21st Ann. Rept., U. S. Geological Survey, Part II, pp. 399-439; 

 W. C. Mendenhall, "Geology of Central Copper River Region, Alaska," U. S. Geologi- 

 cal Survey, P. P. 41, 1905. 



4 C. W. Hayes, op. cit.; A. H. Brooks, A Reconnaissance from Pyramid Harbor 

 to Eagle City, etc.jU. S. Geological Survey, 1901. 



5 Central Copper River Region, Alaska, U. S. Geological Survey, 1902; Head- 

 water Regions of Copper, Nahesna, and Chisana Rivers, Alaska, U. S. Geological 

 Survey, 1902. 



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