TY - RPRT TI - Preliminary stratigraphic studies of the upper part of the Mesa Verde Group, the Wasatch Formation, and the lower part of the Green River Formation, DeBeque area, Colorado, including environments of deposition and investigations of palynomorph assemblages AU - R. C. Johnson AU - Fred May PY - 1978 DO - 10.3133/mf1050 UR - https://pubs.usgs.gov/publication/mf1050 ID - mf1050 ER -