TY - BOOK AU - Johnson,Ronald Carl AU - May,Fred TI - A study of the Cretaceous-Tertiary unconformity in the Piceance Creek Basin, Colorado: the underlying Ohio Creek Formation (Upper Cretaceous) redefined as a member of the Hunter Canyon or Mesaverde Formation T2 - Geological Survey bulletin U1 - 551.77 PY - 1980/// CY - Washington, D.C. PB - United States Government Printing Office KW - Unconformities (Geology) KW - Colorado KW - Piceance Creek Basin KW - Geology, Stratigraphic KW - Cretaceous KW - Tertiary KW - Geology KW - Piceance Creek Watershed N1 - Bibliography: p. 26-27 ER -