Report of the State Mineralogist . 198; U. S. G. S. BulletinNo. 430, pp. 228-239; Bulletin of A. I. M. E., September, 1915, 1889;Report IX, p. 235; Report XV, pp. 817-821. 1 Abstract from report made by H. R. Johnson for the Avawatz Salt and GypsumCompany. SAN BERNARDINO COUNTY. 353 LIME AND LIMESTONE. Limestone deposits of great commercial value occur in severallocalities in San Bernardino County, the most important ones beingthose at Baxter, Colton and Oro Grande. Bibl.: Bull. 38, pp. 61-64. Fifteenth Report, pp. 871-879. LIMESTONE. Swarthout Canon Limestone Deposit. McFadden Corporation,434
Report of the State Mineralogist . 198; U. S. G. S. BulletinNo. 430, pp. 228-239; Bulletin of A. I. M. E., September, 1915, 1889;Report IX, p. 235; Report XV, pp. 817-821. 1 Abstract from report made by H. R. Johnson for the Avawatz Salt and GypsumCompany. SAN BERNARDINO COUNTY. 353 LIME AND LIMESTONE. Limestone deposits of great commercial value occur in severallocalities in San Bernardino County, the most important ones beingthose at Baxter, Colton and Oro Grande. Bibl.: Bull. 38, pp. 61-64. Fifteenth Report, pp. 871-879. LIMESTONE. Swarthout Canon Limestone Deposit. McFadden Corporation,434 Marsh-Strong Building, Los Angeles, California; Ward McFadden,president; S. W. Crockett, superintendent, are opening up a largedeposit of limestone in Swarthout Canon, 10 miles northwest of Cajon,a station on the Santa Fe Railroad. The limestone is hard andcoarsely crystalline and mostly white in color, said to be very plans to ship a large tonnage to Los Angeles and other citieson the coast. Twelve men are Photo No. 42. Afton Magnesite Mine, Afton, San Bernardino County; Cliffside MagnesiteCompany, San Bernardino, California. Photo by Dr. Cook. MAGNESITE. Afton Magnesite Mine. Situated 1^ miles east of Afton Station,on the Salt Lake Route and less than 2000 feet south of the rail-road. The deposit is located on steep hillside on the east side ofCave Canon. Three claims, Cliffside, Hill Top and Crown, have been locatedalong the outcrop. The deposit of magnesite outcrops as a bold whiteledge striking easterly over a precipitous ridge which rises abruptlyout of the Mojave River Valley to an elevation of 500 feet above thefloor of the valley. The magnesite ledge is exposed for about 400feet from the base to the top of the croppings. It forms a strikinglandmark visible several miles west of the deposit. Near the top ofthe cropping a slide has denuded it for a width of a couple of hundredfeet. It here appears to be about 10 to 20 feet thick, dipping 40degree
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
