Volcanic rocks of the El Modeno area, Orange County, California
By: [by Robert F. Yerkes].
Series: Geological Survey professional paper -- 274-L; Shorter contributions to general geology
Publisher: U.S. Govt. Print. Off.
Published: 1957
Place of publication: [Washington
Language: eng
Number of pages: 334
Subjects: Volcanic ash, tuff, etc. -- California -- Orange County.; Rocks, Igneous -- California -- Orange County.; Geology, Stratigraphic -- Miocene.; Formations (Geology) -- California -- Orange County.
Notes: Two folded leaves of maps and sections inserted in back.

Includes bibliographical references (p. 331) and index.