1. Tectonic structure of the main part of the basalt of the Columbia River group, Washington, Oregon, and Idaho [cartographic material] Yale Public content 1970. 2012-10-15T15:16:14Z. 2013-03-18T22:23:21Z. Newcomb, Reuben Clair, 1909-1998. Dept. of the Interior, U.S. Geological Survey. English. Public. Columbia Plateau.