The Chinle (Upper Triassic) and Sundance (Upper Jurassic) Formations in north-central Colorado.  by G.N. Pipiringos, W.J. Hail, Jr. and G.A. Izett.
Contributors: Hail, W.J.; Izett, G.A.
Publisher: U.S.  Dept. of the Interior
Place of publication: Washington
Language: eng
Number of pages: 35
Subjects: Geology, Colorado
Notes: 11