The occurrence of Oligocene in the Contra Costa Hills of middle California
By: by Bruce L. Clark.
Series: University of California publications. Bulletin of the Department of Geology -- v. 9, no. 2; University of California publications in geological sciences -- v. 9, no. 2.
Publisher: Johnson Reprint
Published: 1966
Place of publication: New York
Language: eng
Number of pages: 21
Subjects: Geology -- California -- Contra Costa County.; Geology, Stratigraphic -- Oligocene.
Notes: Reprint of the 1915 ed. published by University of California Press, Berkeley.

Bibliographical footnotes.