West Australian Mining Industry; Issued as a Special Edition of the Australian Mining Standard. Dec. 8, 1904

West Australian Mining Industry; Issued as a Special Edition of the Australian Mining Standard. Dec. 8, 1904

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...numerous A (r'eneral Vieiv of Gabanintha centre is situated about 10 miles to the north of Quinn's, and some 22 miles east of Nannine. The reefs and lodes occur both in the greenstones and in the granite, those found in the latter being usually close to its junction with the greenstones, and consisting generally of very large white barren-looking quartz reefs outcropping for a considerable distance. A large quartz reef close to the greenstones, and running parallel to the junction, has been worked apparently to a depth of about 70 feet; evidently. however, it had not proved much good, and has been abandoned for some time. Some two miles to the north-east of the townsite of Gabanintha is situated Mount Yagahong. This is an almost fiat-topped hill, rising to a height of some 300 feet above the surrounding plains, and having, on the southern side, vertical cliff faces for about one hundred feet from the top. It consists of horizontally bedded basic tufis, which are well seen in the cliff faccs_ where they appear as a fine-grained rock closely resembling a slate in appearance, the rocks on the top of the hill being coarser-grained. A section of a specimen taken from a few feet from the top, and seen under the microscope, shows it to be a fragmental rock consisting principally of broken crystals of felsp-ar (plagioclase) showing very few signs of alteration; in addition to the felspar there are numerous small crystals of colorless augite and minute flakes of pale green hornblende consideira-bly chlo-ritised; small crystals of magnetite are also present, and one or two inclusions of rock fragments as well as a considerable amount of colorless glass. These tuffs overlie the granite. A few miles to the eastward are one or two other hills exactly...show more

Product details

  • Paperback | 234 pages
  • 189 x 246 x 12mm | 426g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236940350
  • 9781236940353