| Reference | {Deposit:: Bush, A.L., 1951, Sources of lightweight aggregate in Colorado: Colorado Scientific Society Proceedings, v. 15, no. 8, p.338.}{Deposit:: Armbrustmacher, T.J., 1988, Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado: U.S. Geological Survey Professional Paper 1049-F, 34 p.}{Geology:: Parker, R.L., and Sharp, W.N., 1970, Mafic-ultramafic igneous rocks and associated carbonatites of the Gem Park Complex, Custer and Fremont counties, Colorado: U.S. Geological Survey Professional Paper 649, 24 p.}{Geology:: Christman, R. A., Brock, M. R., Pearson, R. C., and Singewald, Q. D., 1959, Geology and thorium deposits of the Wet Mountains, Colorado - a progress report: U.S. Geological Survey Bulletin 1072-H, p. 491-535.}{Geology:: Cappa, J. A., 1998, Alkalic igneous rocks of Colorado and their associated ore deposits: Colorado Geological Survey Resource Series 35, 138 p.}{Geology:: Armbrustmacher, T.J., 1984, Alkaline rock complexes in the Wet Mountains area, Custer and Fremont counties, Colorado: U.S. Geological Survey Professional Paper 1269, 33 p.} |