Geochronology and geology of late oligocene through miocene volcanism and mineralization in the western San Juan Mountains, Colorado / 
by Dana J. Bove ... [et. al.] 
 - Washington, D.C. :  United States Government Printing Office,  2001 
 - iii, 30 p. :  ill., maps ;  28 cm. 
 - U.S. Geological Survey professional paper ;  1642 .
<br/><br/> Version 1.0"--T.p. verso 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Oligocene<br/>Geology, Stratigraphic--Miocene<br/>Geology--San Juan Mountains (Colo. and N.M.)<br/>Geology--Colorado<br/>Volcanism--San Juan Mountains (Colo. and N.M.)
<br/><br/><label>Dewey Class. No.: </label>551.785097883