Santa Cruz County History - Making a Living

Mineral Survey of Santa Cruz County - Clay
by C. McK. Laizure

Prepared by C. McK. Laizure,
Mining Engineer of the California State Mining Bureau

Up to the present time the clay deposits in Santa Cruz County have been only superficially studied. Common clays, suitable for brickmaking and similar uses, are known to occur along San Lorenzo River and at other points and there is no doubt a plentiful supply of such low-grade clays. In the early nineties two brickyards were in operation near Santa Cruz, but these have long since been dismantled. Deposits of cream-colored pottery clay are also said to be known, but their exact locality was not divulged to the writer. (Since the above was written the Mining Bureau has been informed that there is a "fine large deposit of pottery clay" on the property of J.B. King, Skyland; P.O. Wrights Station. This information was received too late for confirmation by personal examination)

The only clay now produced in the county is that used by the Santa Cruz Portland Cement Company. It is mined near Tank Siding, 1.8 miles southwest of Glenwood and at their Limestone quarry, and used in the manufacture of cement at the company's plant at Davenport. Operations at Tank Siding are not carried on continuously; their annual requirements being taken out during the most favorable season by a few months' intensive mining operations.

Further data relative to the clays of this county will be contained in a new bulletin of the State Mining Bureau on the clay industry of California, now in course of preparation by W. I. Dietrich, Ceramic Engineer.


State Mineralogist's Reports X, p. 625; XII, p. 383; XIII, p. 619; XVII, p. 234; Preliminary Report No. 7, p. 97.

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Bituminous Rock   Gold Mineral Water
Black Sand Granite Moulding Sand & Peat
Cement Iron Petroleum & Potash
Clay Lime Stone Industry
Coal Limestone   

The Mineral Survey of Santa Cruz County was printed in the Santa Cruz Chamber of Commerce Annual Report, 1926. Reproduced by permission of the Santa Cruz Area Chamber of Commerce.

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