The Jurassic Wanakah and Morrison formations in the Telluride-Ouray-western Black Canyon area of southwestern Colorado : revision of the Wanakah Formation and basal Morrison Formation in part of the Black Canyon of the Gunnison River /
O'Sullivan, Robert Brett,1923-
Geological Survey (U.S.)
Washington : U.S. G.P.O.,
1992.
Includes bibliographical references.
Geology, Stratigraphic
Geology