The structural and industrial materials of California (1906)
Aubury, Lewis E., 1862- · Sacramento, W. W. Shannon, Superintendent state printing · leaf 229
ored plastic clay that is not used,but which must be removed in order to get the fire clay. Overlyingthe green clay in most places is a layer of sand containing polishedgranite bovilders. Despite the considerable expense of quarrying theclay at this pit, it has been removed in large quantities. The… … ILL. No. 101. H.\RKIXGTOX CLAY PIT, 10 MILES SOUTH OF CORONA, RIVERSIDE COUNTY. to 40 feet in thickness in different portions of the pit, which extendsover an area of about half an acre. This clay is at present (.June, 1904)being shipped in larger quantities than from any of the other pits.…
Building stones · Portland cement · Clay · Mines and mineral resources
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