The structural and industrial materials of California (1906)
Aubury, Lewis E., b. 1862 · Sacramento, W.W. Shannon, Superintendent State printing · leaf 194
e layers contain manyfossil fragments. Tlie clay beds have been elevated and crumpledsomewhat. At the clay pit where they are working the strata standvertically. The clay crumbles and slakes rapidly on exposure to theair, so it is customary to plow it up and leave it exposed to the airand sun a… … & ou oo M z;w M a H ■ji z; o Qui o Q 2; ;^ Aa Q ?; P3OPh o< a it o zo oA (187) 188 STRUCTURAL AND INDUSTRIAL MATERIALS OK CALIFORNIA. Analysis of Clay Used by the Pacific Portland Cement Company. ILT Cent. Silica (SiO^) 58.t)5 Aluniiiia ( AljOj) 1«.25 liO;<s on ijiiiition (mainly water…
Building stones · Portland cement · Clay · Mines and mineral resources
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