 | | Report (volume) | | Associated with Stratabound Sulfide Deposits, Custer County, Colorado GEOLOGICAL SURVEY BULLETIN 1513 ~apphirine...Associated with Stratabound Sulfide Deposits, Custer County, Colorado By WILLIAM H. RAYMOND, PETER A. LEIGGI...associated with stratabound sulfide deposits, Custer County, Colorado. (Geological Survey Bulletin 1 513) Bibliography:...of Docs. no.: I 19.3:1513 1. Sapphirine-Colorado-Custer County. 2. Geology, Stratigraphic-Precambrian.... 3. Sulphides. 4. Geology-Colorado-Custer County. I. Leiggi, Peter A., joint author. II. Sheridan, Douglas |  | | Journal (article/letter/editorial) | | METAMORPHOSED PROTEROZOIC BASE-METAL SULFIDE OCCURRENCES, COLORADO: A RE-EVALUATION OF GAHNITE COMPOSITION AS A GUIDE...metamorphosed to the amphibolite and granulite facies in Colorado, many of which are spatially associated with Mg-rich...the Wet Mountains (Marion and Amethyst prospects and an unnamed prospect) are depleted in Zn and enriched...tremolite, forsterite, cummingtonite, sapphirine, cordierite, enstatite, and clinohumite. The composition...massive-sulfide deposits in Mg-rich alteration zones in Colorado, causes a marked enrichment in the spinel component |  | | Book | | 193-256 137-208 129-192 209-264 193-256 [ [ COLORADO-Ill] 177-256 121-184 89-168 1-120 1-88 [ ...177-256 185-280 169-248 [ 425-528 337--400 COLORADO-II] 321--400 337--400 ARIZONA-Ill] 337--400...69-132 65-128 1-64 11 / 1980 20 I 1989 [ COLORADO-I] [ 289-352 385-448 [ AUSTRALlA] 353-504...Iaria from the Howard-Montgomery quarry, Howard County, Maryland (by J. S. White) 25:53-54 AFGHANISTAN...Iron-manganese phosphates of the Williams pegmatites, Coosa County, Alabama (by P. B. Leavens & T. A. Simpson) 6:66-73 |  | | Report (edition) | | chalcedony, organic gems, tiger eye jasper, aragonite, cordierite, black jade, mookaite, fuchsite, jasper, and............................................ 100 Amethyst in Western Australia................................................ 183 Chapter 17 Cordierite 185 Cordierite properties..................................................................... 185 Cordierite in Western Australia........................................................ 52 The Dalglish prospect in the Spargoville area ..................... |  | | Book (volume) | | Duane L. Leavitt The Bennett Pegmatite, Oxford County, Maine . ........................................permanent photographic exhibits in the northeastern USA. The Shaubs have been active in ornithological research...tourmalinebearing Himalaya pegmatite at Mesa Grande, San Diego County, California. Most recently, Gene was gratified...articles and many books including Mineralogy of Colorado and Dana's System of Mineralogy. In the mid-1980's...geologist for the U.S. Geological Survey, Denver, Colorado, continued to energetically and enthusiastically |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |  | | Report (edition) | | ......................................... 102 Amethyst in Western Australia ........................................................ 247 Desert gold prospect.................................................blue-green elbaite gemstone from the Dalglish prospect near Spargoville......................................................... 94 Micrograph of an amethyst gem showing multiple twin planes.......................................................... 95 Amethyst quartz crystal displaying a sharply delineated |
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