The Geological Observer by De La Beche at Bookstore UAE
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The Geological Observer

The Geological Observer


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About the Book

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. 1853 Excerpt: ...from certain conditions. "As," he observes, " the basin of the spring has no part in this incrustation, it becomes converted into a deep tube as it is gradually inclosed by a hillock of siliceous tuff, combining, when it has reached a certain height, all the requirements necessary to convert it into a Geyser. If such a tube be narrow, and be filled with tolerable rapidity by a column of water strongly heated from below by the volcanic soil, a continuous Geyser must necessarily be produced, as we find them in so many parts of Iceland. For it will easily be understood that a spring, which originally did not possess a higher temperature at its mouth than that which would correspond to the pressure of the atmosphere, may easily, when it has been surmounted by a tube, formed by gradual incrustation, attain at its base a temperature of upwards of 1000 centigrade (212 Fahrenheit), owing to the pressure of the fluid resting in the tube." Sulphate of lime 1-2712 Sulphate of magnesia 1-0662 Sulphide of oxide of ammonium... 0-7333 Sulphate of alumina 0-3261 Sulphate of soda........ 0-2674 Sulphate of potash 0-1363 Silica 0-4171 Alumina 0-0537 Sulphuretted hydrogen 0-0820 Water 9995-6467 The clay and gypsiferous accumulations resulting from these waters, or rather from the general action of their constituent parts upon the rocks traversed by them, and upon each other, possess much interest. The palagonite-tuff is decomposed, and clay, often variegated in colour, is deposited, and sulphate of lime is also formed. The gypsum occurs as isolated crystals, and " in connected strata and floor-like depositions, winch not unfrequently project as small rocks, where the loose soil has been carried away by the action of the water. These depositions are so...


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Product Details
  • ISBN-13: 9781152829824
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 346
  • Spine Width: 18 mm
  • Width: 189 mm
  • ISBN-10: 1152829823
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 617 gr


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