TY - RPRT TI - Results of chemical analyses of soil, shale, and soil/shale extract from the Mancos Shale formation in the Gunnison Gorge National Conservation Area, southwestern Colorado, and at Hanksville, Utah AU - Michele L.W. Tuttle AU - Juli Fahy AU - Richard I. Grauch AU - Bridget A. Ball AU - Geneva W. Chong AU - John G. Elliott AU - John J. Kosovich AU - Keith E. Livo AU - Lisa L. Stillings PY - 2007 DO - 10.3133/ofr20071002d UR - https://pubs.usgs.gov/publication/ofr20071002D ID - ofr20071002D ER -