Bulletin Volume 399-406

Bulletin Volume 399-406

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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. 1909 edition. Excerpt: ...shade and medium, evengrained texture with feldspars up to 0.4 inch and mica to 0.1 inch. Its constituents, in descending order of abundance, are: Very light smoky quartz with fluidal and other cavities in sheets and a set of cracks parallel thereto, also with traces of another set of sheets at right angles to these; milk-white soda-lime feldspar (oligoclase) slightly kaolinized with a little white mica and epidote, some of it intergrown with quartz in vermicular structure; bluish potash feldspar (microcline, also orthoclaso) similarly intergrown; biotite (black mica) and a little muscovite or bleached biotite. Accessory, titanite, zircon crystals, apatite, and pyrite. Secondary, epidote, kaolin, and white mica. The reck does not effervesce with cold dilute muriatic acid. Its contrasts are weak. The quarry, opened in 1906, is about 200 feet square and from 2 to 4 feet deep. The sheets, from 6 inches to 4 feet thick, dip 15 S. 25 W. and are normal. There is but one set of joints, which strike east-west, and are vertical, at irregular intervals, and discontinuous. The rift is reported as vertical north-south and the grain as horizontal. The flow structure (biotitic streaks) strikes N. 70 W. and dips 20 N. 20 E. A schist inclusion measures 12 by 8 inches. Small vertical pegmatite dikes strike N. 15 E. The plant consists of a derrick, hoisting engine, two air compressors, a steam drill, and two air-plug drills. Transportation is by cartage 3 miles to cutting sheds at South Ryegate, 940 feet lower. The product is used for monuments and bases, and to some extent for building. MORRISON QUARRY. The Morrison quarry is on the southwest side of Blue Mountain, in Ryegate, about 940 feet above the village of South Ryegate and about 700 feet southeast...show more

Product details

  • Paperback | 356 pages
  • 189 x 246 x 19mm | 635g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236777921
  • 9781236777928