The structural and industrial materials of California (1906)
Aubury, Lewis E., b. 1862 · Sacramento, W.W. Shannon, Superintendent State printing · leaf 65
been made in the following pages. The gabbro occurs apparently as an intrusive boss in the midst of 58 STRUCTLKAl, AND INDUSTRIAL MATERLVLS OP CALIFORNIA. the granites. It outcrops over ;m area of about a square mile on thehill at Dehesa, and is said by Fairl)anks to extend 4 or 5 miles south-east.… … ILL. No. 2:^. SECTION OF ORBICULAR GABBRO, SHOWING GENERAL APPEARANCE. W\uU minerals are feldspars. Dark minerals are olivines, hornblendes and hyper- sthenes. Thickness, aboutimm. Natural size. rock. The boulders vary in size, some of the larger ones being severalfeet in diameter. The orl)icular…
Building stones · Portland cement · Clay · Mines and mineral resources
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