Economic Geology: 1908

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Economic Geology Publishing Company, 1908 - Geology
 

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Page 73 - F. as practicable, and observed at intervals for at least 28 days. (c) A third pat is exposed in any convenient way in an atmosphere of steam, above boiling water, in a loosely closed vessel, for five hours. These...
Page 354 - Any member of the Association may be suspended or expelled for misconduct in his relations to this Association or in his profession on conviction thereof in such manner as may be prescribed by the...
Page 354 - ... in the office of the Society ten days before the annual election. SEC. 8. Any Manager who shall fail to attend three consecutive meetings of the Board, unless excused by vote of the Board, shall cease to be a Manager. SEC. 9. The Board of Managers shall at its annual meeting elect a President, two Vice-Presidents, a Secretary and a Treasurer, who shall hold office for one year, or until their successors are elected. The President, VicePresidents and Treasurer shall be members of the Board. SEC....
Page 234 - In porous rocks that are only partly filled with water, the oil accumulates at the upper limit of the saturated area. This limit of saturation traces a level line around the sides of each structural basin, but the height of this line may vary greatly in adjacent basins and in different sands of the same basin. "Partial saturation is the condition most generally found, in which case accumulations of oil may occur anywhere with reference to the geologic structure; it is most likely, however, to occur...
Page 117 - ... formed a coating over the clay particles or fine sand grains. The greater part of the fine red and yellow iron oxide was dropped with the coarse sand grains, over which it formed a coating, or with which it was intimately mixed and not easily separable. The entire absence of or only a small percentage of lime and magnesia is due to the fact that only a very small percentage of the lime and magnesia bearing minerals, of the igneous and metamorphic rocks of the Piedmont Plateau, reached a sufficient...
Page 311 - There is little doubt in the mind of the writer that the oils and gases of the Mesozoic and Tertiary, as well as of the Paleozoic, are directly derived, in most cases at least, from dynamic distillation of algal debris, though in part originally of animal origin." He thus attributes its production to a time subsequent to the deposition of the beds containing the algal debris. Similarly, Dr. FW Clarke, without expressing his views as to the direct cause of the transformation, believes this transformation...
Page 72 - It shall develop initial set in not less than ten minutes, and hard set in not less than thirty minutes, nor more than three hours.
Page 107 - BULLETIN 339. The purchase of coal under government and commercial specifications on the basis of its heating value, with analyses of coal delivered under government contracts, by DT Randall. 1908. 27 pp. 5 cents. BULLETIN 343.
Page 189 - These sections are typical for this part of the state. It will be seen that the coal consists of two benches separated by a prominent layer of shales or clay, called soapstone by the miners. This structure of the Pittsburg seam is very persistent in southern Ohio, and may be found wherever the coal exists in anything like normal thickness. It is further illustrated by sections on following pages.
Page 245 - ... fatty substances from which the oil is to be produced. The beds of sulphur which occur adjacent to some oil wells, notably in Texas, were probably formed by the reducing action of organic matter upon sulphates, such as gypsum, a mineral which is often associated with marine deposits and with petroleum. The association of gas, oil, salt, sulphur, and gypsum, which some writers have taken as evidence of former volcanism, is much more simply interpreted, both chemically and geologically, as due...

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