1. Sample locality map and analytical data for potassium-argon ages in the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska Peninsula Yale Public content 1994. 2002-06-01T04:00:00Z. 2016-05-18T15:02:08Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. cartographic image. Public. Alaska, Alaska Peninsula, U.S., and Alaska Peninsula.