Calderas of the San Juan volcanic field, southwestern Colorado : eighteen major ash-flow tuff sheets were deposited and perhaps as many related calderas developed during emplacement of an underlying shallow batholith in late Oligocene time / by Thomas A. Steven and Peter W. Lipman.

Author/creator Steven, Thomas A.
Other author Lipman, Peter W.
Format Book
Publication InfoWashington : U.S. Govt. Print. Off, 1976.
Descriptioniii, 35 pages : illustrations ; 30 cm.
Subjects

SeriesGeological Survey professional paper ; 958
Geological Survey professional paper 958. ^A16492
Local noteJoyner-FOR JOYNER LIBRARY HOLDINGS OF THE SERIES, GEOLOGICAL SURVEY PROFESSIONAL PAPERS, SEARCH BY CALL NUMBER QE75 .P9.
Bibliography noteBibliography: p. 34-35.
LCCN 75619377
Govt. docs number I 19.16:958