O'Sullivan, Robert Brett <br/><br/>
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 / 
by Robert B. O'Sullivan 
 - Washington :  United States Government Printing Office,  1992 
 - iii, 24 p. :  ill. ;  28 cm. 
 - U.S. Geological Survey bulletin ;  1927 .
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Jurassic<br/>Geology--Colorado
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Morrison Formation
<br/><br/><label>Dewey Class. No.: </label>551.709788