GLACIAL DEPOSITS OF THE CONTINENTAL TYPE 291 
The areas of continental glacial deposits in the interior are much 
larger and may be computed from Brooks’s map (Fig. 1) as follows: 
at least (a) 15,000 square miles in the Copper River basin, (6) 
Fic. 1.—Map of Alaska showing areas of glacial deposits of the continental type 
(dotted areas). Boundaries of glaciation shown by dashed lines. (After A. H. 
Brooks.) 
27,000 square miles in the Tanana and Kuskokwim valleys, (c) 
17,000 square miles in the Yukon Flats, (d) several thousand square 
miles on the upper Yukon region in Canada, and smaller areas. 
