1. Bedrock geologic map of part of the northern disturbed belt, Lewis and Clark, Teton, Pondera, Glacier, Flathead, Cascade, and Powell Counties, Montana [cartographic material] Yale Public content 1983. 2016-01-06T18:05:20Z. 2016-07-13T21:10:11Z. Mudge, Melville R., 1921-. U.S. Geological Survey. English. cartographic image. Public. Montana and Montana.