Epis, Rudy C.  1930- <br/><br/>
Stratigraphic nomenclature of the Thirtynine Mile volcanic field, central Colorado / 
by Rudy C. Epis and Charles E. Chapin. 
 - Washington:   United States Government Printing Office,   1974.  
 - iii, C23 p. :  maps, tables ;  23 cm. 
 - Contributions to stratigraphyChapter C Geological Survey BulletinChapter C  1395 .
<br/><br/>Includes bibliographical references (p. C21-C23). 
<br/><br/> Descriptions of volcanic and nonvolcanic units showing their chemistry, age, and interrelationships. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Tertiary<br/>Geology--Nomenclature--Colorado<br/>Geology, Stratigraphic--Nomenclature<br/>Volcanism--Colorado
<br/><br/><label>Dewey Class. No.: </label>557.308