The Channeled Scabland, Masalah 22U.S. Government Printing Office, 1932 - 16 halaman |
Istilah dan frasa umum
abundant Anaconda anticline Badlands basalt Beartooth beds Big Horn Basin Black Hills bornite breccia Butte Cambrian canyon cataract chalcocite CHANNELED SCABLAND Clark Fork cliffs conglomerate copper Cretaceous Deadwood deposits district east eastern eastward Elk Basin Eocene erosion exposed farther fault fauna feet 30 meters fissures floor formation fossil geologic geysers glacial gold Grand Coulee granite gravel highway hogback HORN REGION hot springs kilometers Lake limestone lower mile 1.6 kilometers minerals mining monocline Montana Newcastle northern northwest Oligocene outcrop Paleocene Paleozoic pegmatite peneplain plateau Polecat Bench pre-Cambrian Pryor Mountains pyrite quartz Quincy Basin Red Lodge remnants rhyolite ridge road sandstone schists sediments seen shales Shoshone showing side slope South Dakota stream structure sulphide summit surface synclinal terrace Tertiary thickness thrust uplift upper coulee Upper Cretaceous valley vein system vertical volcanic wall western White River Yellowstone Park YELLOWSTONE-BEARTOOTH-BIG HORN zone
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Halaman 3 - States governing their possessory title, shall have the exclusive right of possession and enjoyment of all the surface included within the lines of their locations, and of all veins, lodes, and ledges throughout their entire depth, the top or apex of which lies inside of such surface lines extended downward vertically, although such veins, lodes, or ledges may so far depart from a perpendicular in their course downward as to extend outside the vertical side lines of such surface locations.
Halaman 25 - SALES, RH, The localization of values in ore bodies and the occurrence of shoots in metalliferous deposits; ore shoots at Butte, Montana: Econ.
Halaman 20 - TA, Jr., Economic resources of the northern Black Hills: US Geol. Survey Prof. Paper 26, 222 pp., 20 pis., 1904.
Halaman 25 - The localization of values in ore bodies and the occurrence of shoots in metalliferous deposits; ore shoots at Butte, Montana: Econ. Geology, vol. 3, pp. 326-331, 1908; Eng. and Min. Jour., vol. 86, pp. 226-227, 1908. 19. SALES, RH, Superficial alteration of the Butte veins: Econ. Geology, vol. 5, pp. 15-21, 1910. 20. SALES, RH, Ore deposits at Butte, Montana: Am.
Halaman 17 - It is said by a few observers to be characteristically a mineral of the border zone of the central copper area. It may be considered as an "edge...
Halaman 13 - A'-A', the manganese minerals rhodonite and rhodochrosite are of frequent occurrence. 3. An outer or peripheral zone of undetermined width bordering the intermediate zone, in which copper has not been found in commercial quantities. The vein filling is chiefly quartz, rhodonite, sphalerite, pyrite, and rhodochrosite.
Halaman 14 - ... relatively much less quantities than in the other two zones. Quartz is the most abundant gangue mineral. * * * Galena is present in considerable quantities.* * * Extending outward from the peripheral zone the fissures appear to become less mineralized, sulphides largely disappearing, the vein filling consisting principally of quartz with scattered pyrite, and curiously enough arsenopyrite has been noted at extreme distances 2 miles [3.2 kilometers] or more from the central copper zone. It should...
Halaman 13 - ... distance along the strike of 1,000 feet [305 meters]. * * * The manganese minerals rhodonite and rhodochrosite begin to appear in small quantities toward the borders of the intermediate zone and increase perceptibly toward its outer" limits. * * * The silver content increases materially. * * * The net result is a decrease in copper content with an increase in silver, zinc, lead, and manganese; quartz as a gangue does not vary, but pyrite is less abundant toward the outside limits. 3. An outer...
Halaman 24 - ... physiographic conditions at Butte, Montana, and Bingham Canyon, Utah, when the copper ores in these districts were enriched: Econ. Geology, vol. 11, pp. 697-740, 1916. 3. BACORN, FW, An amendment to Sales's theory of ore deposition: Am. Inst. Min. Eng. Trans., vol. 49, pp. 300-306, 1915. 4. BARD, DC, and GIDEL, MH, Mineral associations at Butte, Montana: Am. Inst. Min. Eng. Trans., vol. 46, pp. 123-127, 1914. 5. BILLINGSLEY, PAUL, The Boulder batholith of Montana [discussion of ore deposits]:...