Oregon topographic map, United States Geological Survey, United States Department of Interior, Reston, Virginia; displayed via ACME mapper, www.acme.com, 22 November 2016.
Russell, Israel C., "Glass Buttes", Preliminary Report on the Geology and Water Resources of Central Oregon, United States Geological Survey, United States Department of Interior, Government Printing Office, Washington, District of Columbia, 1905, p. 49.