Van Tuyl, Francis Maurice, 1887-1975Johnson, J. Harlan (Jesse Harlan), 1892-Boyd, James, 1904-19872023-03-222023-03-221934https://hdl.handle.net/11124/16924Includes bibliographical references (pages 111-115).doctoral dissertationsengCopyright of the original work is retained by the author.Geology -- ColoradoMines and mineral resources -- ColoradoGeology, Stratigraphic -- PrecambrianText