^Machette, Michael N.; Marchetti, David W.; Thompson, Ren A. (2007). "Chapter G: Ancient Lake Alamosa and the Pliocene to middle Pleistocene evolution of the Rio Grande". Rocky Mountain Section Friends of the Pleistocene Guidebook(PDF). Open-file report ; 2007-1193. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey. pp. 157–167.