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In this article, Bretz describes two glaciers that reached then drained through the northern part of the Columbia basalt plateau. Based on the physical evidence, Bretz attempts to determine when the earlier Spokane glaciation occurred relative to the Wisconsin glaciation.
This publication is 7 pages long.
Geology -- Washington (State)
Archives and Special Collections, Eastern Washington University Libraries
Bretz, J Harlen, "Age of the Spokane glaciation" (1924). Publications from Special Collections. 4.