Geological Investigation of the Clays of Riverside and Orange Counties Southern California (INSCRIBED by the author). J. Clark Sutherland.

Geological Investigation of the Clays of Riverside and Orange Counties Southern California (INSCRIBED by the author)

Sacramento: California Journal of Mines and Geology, 1935. First Thus. INSCRIBED on front cover 'To Robert Linton:/With the compliments of the author, in sincere appreciation of your/suggestions and aid in the collection and recording of the data/incorporated in this paper. s/J.Clark Sutherland'. Octavo; 51-87pp. A Very Good copy in stapled wrappers; offprint of California Journal of Mines and Geology, Report XXXI of the State Mineralogist, January, 1935. Item #19850

'In this paper the author seeks to describe the geological relations and properties of the more important clay producing areas in Riverside and Orange Counties, Southern California. As a result of his work he finds that the clays are found in a particular Tertiary formation, of Martinez age. They were deposited under continental conditions at the edge of a gradually encroaching sea. The clays are invariably associated with lignitic shales and coals and thus represent deposition in a humid, probably temperate climate under extremely reducing conditions. ' (CODA).

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