Van Tuyl, Francis Maurice, 1887-1975Moody, John D.2022-05-102022-05-101947https://hdl.handle.net/11124/13050Includes bibliographical references.masters thesesengCopyright of the original work is retained by the author.Geology -- ColoradoGeology, Stratigraphic -- PrecambrianSedimentary rocksPetrology -- ColoradoText