The Gas and Petroleum Yielding Formations of the Central Valley of California

The Gas and Petroleum Yielding Formations of the Central Valley of California

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 edition. Excerpt: ...years ago an experimental attempt to refine asphaltum was made by the Buena Vista Oil Company. What remains of their plant consists of three kettles, 3x8 feet, by 20 inches deep; a tank, and four kettles not set up. In May, 1893, the tank and three of the kettles were full of oil, and piled up near the kettles were many boxes of refined asphaltum. The asphaltum appeared to contain much oil, for it had partly melted under the heat of the sun. Although there is a large amount of impure, crude asphaltum in these beds, only a small portion is sufficiently pure to pay for mining and refining by the methods now employed. It is possible, however, that the impure, crude asphaltum may be of value as bituminous rock. THE ASPHALTUM VEINS IN THE BUENA VISTA DISTRICT. The principal working from which asphalt was being mined at the time of the writer's visit to this district, is near the N.W. corner of the S.W. i of Sec. 27, T. 30 S., R. 22 E., M. D. M., and is marked as Flag No. 1 in the accompanying sketch-map. It consists of a shaft, with drifts connected therewith. This shaft is about 40 feet deep, and has been sunk on a vein of asphaltum which shows a thickness of 8 feet, and dips about 15 west of north. The asphaltum is of a high grade, is black, lustrous, and breaks with a ready cleavage. At the depth of 15 feet the vein widened and was drifted on for 15 feet 20 east of north, 45 feet 70 east of north, and 18 feet 70 west of south. At the end of the 18-foot drift the vein pinched, and an inclined shaft was sunk thereon 6 feet. At the bottom of the inclined shaft the vein again widened, and was drifted on for about 7 feet in a northwesterly direction along its strike, the foot wall being light-colored clay, and the hanging wall a light-colored, friable...show more

Product details

  • Paperback | 48 pages
  • 189 x 246 x 3mm | 104g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236549252
  • 9781236549259