1. Bedrock geology of the Silver Creek quadrangle, New York [cartographic material] Yale Public content 1953. 2011-11-29T20:57:21Z. 2021-05-04T23:19:46Z. De Witt, Wallace, 1920-. U.S. Geological Survey. English. Public. New York (State), Chautauqua County, Cattaraugus County, and Erie County.