 | | Report (chapter) | | the LIBRARY South Platte District, Colorado · by Wm. B. Simmons and E. Wm. Heinrich Colorado Geological...Denver, Colorado I 1980 Front cover: Wide Angle photograph of the Oregon No. 2~ pegmatite, South Platte...Platte pegmatite district, Colorado. This striking example graphically illustrates the exceptionally welldeveloped...structural zonation of the pegmatites of this district. A fifty foot high column (40 feet across at the...the bottom of the pit. The quartz core of the pegmatite was left standing in relief as the enveloping |  | | Journal (article/letter/editorial) | | looking northwest acro88 the cliff’s of Glen Cove to South Park and the Tarryall Mountains. Researchers have...northeasterly-trending continentul Figure 2. Geologic map of the Colorado Front Range showing the Precambrian metamorphic...1978; Karistrom 1978; Lanthier 1978). Farther south in Colorado, sediments accumulated in decper-water rocks...Survey into “Early, Middle, and Late” Eras. In Colorado we because of the subsequent folding and overthrusting...subduction zone and possibly the creation Era in Colorado and Wyoming of a volcanic island arc. Carpenter |  | | Journal (article/letter/editorial) | | 2000 Lakeshore Drive, New Orleans, Louisiana 70148, USA Sarah L. HANSON Geology Department, Adrian College... 110 S. Madison Street, Adrian, Michigan 49221, USA Alexander U. FALSTER and Karen L.WEBBER Department...2000 Lakeshore Drive, New Orleans, Louisiana 70148, USA Abstract Pegmatites enriched in the rare-earth elements...Wisconsin through Colorado to Arizona. Four widely geographically spaced pegmatite districts that are...are compared and contrasted in this study. The pegmatite districts include the circa 1.5 Ga Wausau syenite |  | | Journal (article/letter/editorial) | | COMPROMISEGROWTHSURFACESON PEGMATITE MINERALS VeNcB Havr.rns American Institute of Research,Gold.en,Colorado. Many crystals...crystals of pegmatite minerals display growth surfaces that form polygonal, step-sidedpyramids. These are...the anomalous pyramidal forms observedon some pegmatite minerals are compromisesurfaces.The steps observedon...changestook place. Both types are observedon some pegmatite minerals.rt is suggestedthat the presenceof steps...are the result of thermal convectionwithin the pegmatite chamber during crystallization. Thus a crystal |  | | Journal (article/letter/editorial) | | approximately 0.3. it is found in a cleavelandite pegmatite at Heydalen ir~ T=~rdal, Telemark, S. Norway.... north of Tveit farm, in "I'erdal, Telemark,', south Norway. It occurs in a pegrnatite dyke, and only...forms [:,art of an inlier within younger Telemark granite., This inlier =,lso contains gabbroic rocks, supracrust~...supracrust~.l lepthes and gneisses. it lies south of the major outcrop of supracrusta! rocks belonging...~=cond generation and that consists mainly of graphic granite. The two components showing grapl'd¢ intergrowth |  | | Report (volume) | | . 234 " y { " ,-t .. .~,:",. I " , COLORADO "or.! _ +, (~ STATE OF .~ :'(' COL~ADO /... BULLETIN 40 RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BlaLlllGRAPHY by James L. Nelson-Moore,...Energy COLORADO GEOLOGICAL SURVEY DEPARTMENT OF NATURAL RESUURCES STATE OF COLORADO DENVER, COLORADO 1978...ete 11 st r ng of rad i aaet 1ve occurrences 1n Colorado, with a comprehensive blbi iography and bibliographic...on the Colorado Plateau sparked several periods of exploratIon that ultimately led to a mining "boom ll |  | | Report (volume) | | Crossroads: Lyons, P. L., 4. Gilbert H., 10. Colorado, South Silverton area: Expanding horizons: Lay, R..., 3. Curtis H., 1. Earth: Vincenz, S. A. , 3. Granite controversy: Read, Primitive homogeneous, evidence:...the future: Just, E. ing: Burwell, E. B., Jr., 4. Mining geology, retrospect and Index fossils: Stephenson...6. L. R. , 6. Mineralogy, chemical, problems: Pegmatite phosphates, problems: Fleischer, M., 6. Fisher..., 11. D. J. Rocky Mtn. geosyncline in Canada: Colorado Plateau: Wengerd, Warren; P. S., 4. S. A., 6. |  | | Report (volume) | | Fillmore County: Pederson, C. A. New Jersey, Dover district, magnetite: Sims, P. K., 1. South Dakota,...geology. Iron, Dover district, magnetite: Sims, P. K., 1. Iron. New Jersey, Dover district, magnetite: Sims...society. A.I.M.E. Trans.-American Institute of Mining, Metallurgical, and Petroleum Engineers Transactions...Ontario. Canadian Inst. Mining and Metallurgy Trans.-Canadian Institute of Mining and Metallurgy Transactions...-Canadian Mining Journal. Gardenvale, Quebec. Canadian Min. Metall. Bull.-Canadian Mining and Metallurgical |  | | Book (edition) | | three main groups of minerals (with distinguished graphic form): a) valid mineral species: here we include... with all The color of most opaque minerals is white or gray in possible intermediate gradations. Luster...abbreviations: Rep. (republic), prov. (province), co. (county), munic. (municipio), pref. (prefecture), dept...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....always included in text, except in the cases of the USA, UK, and the provinces Ontario and Quebec in Canada |  | | Book (edition) | | mostly of large specimens, as well as 104 black-and-white photographs • 45 new crystal drawings of rare species...Encyclopedia of minerals ~~cbe County Public Library Saguache, Colorado OEMCO For Refere nee Not to...Sagtiache Co1tntr Publlc I...ibran' Saguache, Colorado ~ VANNOSTRAND REINHOLD ~ - - - - N e w York...be reproduced or used in any form by any means-graphic, electronic, or mechanical, including photocopying...England Thomas Nelson Australia 102 Dodds Street South Melbourne, Victoria 3205, Australia Nelson Canada |  | | Book (edition) | | Mineralogy, Museum of Geology South Dakota School of Mines & Technology Rapid City, South Dakota GEORGE ROBERT...reproduced or used in any form or by any means-graphic, electronic, or mechanical, including photocopying...of weakness caused by deformation or twinning. pegmatite Very coarse-grained granitic rock representing...the Fuernrol No. 2 mine, Temple Mountain, Emery County, Utah; also sparsely disseminated in uraniferous...the Cave Hills and Slim Buttes areas, Harding County, South Dakota. BEST REF. IN ENGLISH: Thompson, M. E | | | Book (edition) | | mostly of large specimens, as well as 104 black-and-white photographs 45 new crystal drawings of rare species...rnodochrosite, N’Chwaning mine, South Africa; (lower left, center) wulfenite, Red Cloud mine, Arizona; (lower right...Encyclopedia of minerals Sagiiache County Pu blic Library Saguache , Colorado DEMCO For Reference Not to...Wendell E. Wilson Library Saguache County Public Saguache, Colorado VAN NOSTRAND REINHOLD New York ...be reproduced or used in any form by any means—graphic, electronic, or mechanical, including photocopying |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | B. Hoover: U.S.G.S., Federal Center, Lakewood, Colorado. John M. Hughes: Dept. of Geology, Miami University...Smithsonian Inst., Washington, D.C. Alan Pring: South Australian Museum, Adelaide, SA, Australia. Gunnar...Louise Reif: U. S. G. S., Federal Center, Lakewood, Colorado. Charles B. Sclar: Dept. of Earth Sciences, Lehigh...University of Arizona, Tuscon, Arizona. John S. White: Stewartstown, Pennsylvania. Hans J. Wilke: Eppertshausen/Hessen... except where noted. Labels on the axes have a white background, and when axes point toward the observer |  | | Book | | ORIGIN OF GRANITIC ROCKS 2. V. Marmo GRANITE PETROLOGY AND THE GRANITE PROBLEM 3. J. Didier GRANITES AND...Edited by F. BARKER U.S. Geological Survey, Denver, Colorado, U.S.A. ELSEVIER SCIENTIFIC PUBLISHING COMPANY...have been termed trondhjemite, tonalité, soda granite, leucogranodiorite, soda rhyolite, high-silica...and plutonio parts of Late Archean greenstone-granite terranes, to form widely scattered extrusive and...this apparatus. Fred Barker June 1978 Denver, Colorado CONTRIBUTORS J. G. Arth, 929 National Center |
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