1. Map and tables showing preliminary results of K-Ar age studies in the Ugashik quadrangle, Alaska Peninsula [cartographic material] Yale Public content 1982. 2023-03-17T19:11:02Z. 2023-03-22T21:33:14Z. Wilson, Frederic H., 1950- author. U.S. Geological Survey. English. cartographic image. Public. Alaska, Ugashik, and Ugashik.