Irving, Earl M.  1911- <br/><br/>
Structural evolution of the northernmost Andes, Colombia / 
by Earl M. Irving ; prepared in cooperation with the Instituto Nacional de Investigaciones Geologico-Mineras under the auspices of the Government of Colombia and the Agency for International Development, U.S. Department of State 
 - Washington, D.C. :  United States Geological Survey,  1975 
 - iii, 47 p. :  ill., maps (2 fold. col. in pocket) ;  29 cm. 
 - Geological Survey professional paper ;  Bull.no.846 .
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 38-42 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Colombia<br/>Geosynclines--Colombia
<br/><br/><label>Dewey Class. No.: </label>558.61