1. Post-Paleocene Tertiary rocks and Quaternary volcanic ash of the Wet Mountain Valley, Colorado : a stratigraphic and structural study of sedimentary and volcanic rocks along a graben in south-central Colorado Author/Creator: Scott, Glenn R., 1918-2012 Publication/Creation: Washington : U.S. Govt. Print. Off, 1975 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no.865-869. Access & Availability: Loading