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| of Earth, which is not recorded directly in the rock record, is termed the Hadean Eon; Volume 76, September/Octokr...northeasterly-trending continentul Figure 2. Geologic map of the Colorado Front Range showing the Precambrian metamorphic...Karistrom 1978; Lanthier 1978). Farther south in Colorado, sediments accumulated in decper-water rocks formed...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 |
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| on Amazonite 7.5 cm, from the Smoky Hawk claim, Colorado. Collected by the Dorris family; Tom Spann photo...thrill of discovery. After all, every mineral specimen in collections around the world has but a single...‘bruised’ area in the center which resulted from the specimen falling on my hard hat as it was being pried off...off the back. “The most memorable specimen that I collected was one at the very top of the dome, and...came in, one at a time, to see this magnificent specimen before we removed it. “By afternoon, we left the |
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| COLORADO TOPAZ Topaz, Al Si0 (F,OH) is one of Colorado's better known gem minerals. Though Col orado...(PJM), 975 (TCM) Box 25046, Federal Center Denver, Colorado 80225-0046 A ccording to Cross and Hillebrand...discovery of Colorado topaz was made about 1880 by a Mr. Thiebald,* "a prospector of Colorado Springs."...area. The largest fine-quality topaz specimens in Colorado occur in several separate and distinct localities...are also referred to the general discussions of Colorado topaz in Eckel (1961) and Pearl (1963) and to |
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| Denver, Colorado, USA © 2011 by Lithographie, LLC P.O. Box 11613 • Denver, CO 80211 • USA Phone 1.303...collection Robert Weldon photo Above: Topaz, 5.5 cm tall El Chalten, Santa Cruz, Argentina Scott Rudolph collection...Topaz ALFREDO PETROV & JOHN RAKOVAN 34. Colorful Colorado DAVID W. BUNK 42. Mongolian Topaz: The Gorkhi...surface (001), the refractive index of a given specimen can provide a sensitive method for determining...Mine, Thomas Range, Utah; Utah Mineral and Fossil specimen, Scovil photo Middle left: Topaz and quartz, 2 |
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| long (Marty, 2004 ). AFRICA widely in Litchfield County, where good crystals were taken from quartz veins...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns...Litchfield County. Ilmenite masses and crystals from somewhere near Washington, Litchfield County, were described...Lake Road occurrence, Faraday Township, Hastings County. In fall 1994, Dan and Shelley Lambert extracted...Madawaska [Faraday] mine near Bow Lake, Hastings County. Some of the world's finest ilmenite specimens |
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| Menzies Pink topaz from the Thomas Range, Juab County, U ta h .........................................to Uli c/o Martin Zinn, P.O. Box 2433, Evergree Colorado 80439. I The Mineralogical Record, volume 26,... Crawford, David Minerals Crystal Systems D & M Rock & Gem D J Minerals, Inc. De Trin Minerals Delta...Carter Fine Minerals Richards - Foster Rock & Mineral Magazine Rock Art Fossils of The UK - England Rocks...Thom pson, Wayne A., Fine Minerals Tideswell Dale Rock Shop - England Tintic & Tiger Trading Co. Top M |
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| archives of data for the mineral collector and specimen-oriented mineralogist that has ever existed. This...chemical analysis, physical properties, etc.) s Specimen locality attribution only; no information about...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 |
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| & SCIENCE AUCTION AUGUST 26, 2019 | DALLAS THE ROCK H. CURRIER COLLECTION OF FINE MINERALS Front Cover:...Lot 72173 Inside Back Cover: Lot 72175 Back Cover: Rock Currier with Lot 72266 Heritage Signature® Auction...Auction #5445 Nature & Science Featuring: The Rock H. Currier Collection of Fine Minerals August 26,...Enthusiast: Welcome to the slightly bent world of the Rock H. Currier Collection. Within the pages of this...tickled his unusual fancy and so were acquired. Rock (yes, that was his given name) devoted many years |
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| claim, Pikes Peak batholith, Teller County. The Collector’s Edge specimen, Jeff Scovil photo. PETER J. MODRESKI...Mail Stop 150, Box 25046 Federal Center Denver, Colorado 80225 pmodreski@usgs.gov C olorado is, of course...been written as guides to mineral collecting in Colorado. A classic, which went through three major editions...1951 version with a slightly different title), is Colorado Gem Trails and Mineral Guide, by Pearl (1951,...up-to-date guidebook to the state’s minerals is Colorado Rockhounding, by Voynick (1994). Other published |
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| G EM S: C A RRY ING O N TH E LEG AC Y O F O N E ROCK H OU N D’S DRE A M Limestone Agates Unexpected... ENCHANTING AMETHYST RED FEATHER LAKES DELIVERS ROCK & GEM • Vol. 49 No. 09 • U.S. $5.99 Issue Code:...Claim Inspires Adventure Stuart ‘Tate’ Wilson 26 Rock & Gem Kids The Many Facets of Nadine Marshall 44...of a Gem Shop The Sanchez Family of San Juan Gems Rock Shop Antoinette Rahn Jim Brace-Thompson 56 Driven...Community Outlook ...........54 Minerals Lives On Rock Science .....................74 Bob Jones Reviewing |
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| Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Steven R. Morehead...Michigan Correspondents Dudley Blauwet Louisville, Colorado Miguel Calvo Zaragoza, Spain Renato Pagano Milan...100-year history of the Benitoite Gem mine, San Benito County, California . . . . . . . . . . . . . . . . . ...BENITOITE specimen known as “the Wreath,” 6 cm, from the Benitoite Gem mine, San Benito County, California...California. Natural History Museum of Los Angeles County collection; photo by Harold and Erica Van Pelt. The |
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| R. Kampf Natural History Museum of Los Angeles County George Robinson National Museums of Canada Arthur...SPECIMENS from the collection of the Geology Museum, Colorado School of Mines. See page 242 for a full description... All rights reserved. notes fromthej EDITOR COLORADO-III Here we are with our third special issue devoted...devoted to the mines and minerals of Colorado. As most long-time subscribers know, the first in the series...about $200 on the out-of-print market. The second Colorado issue was vol. 10, number 6 (1979), and we still |
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| localities. Of particular note is an exceptional Sulfur specimen from Italy – a tremendously large crystal on matrix...largest Sapo Mine “shaving brush” and an exceptional Elbaite on Feldspar. And then there is another Rose Quartz...Mammoth-Saint Anthony Mine, Tiger, Pinal Co., Arizona, USA Named by the Romans for the area of Scotland beyond...Wisconsin, USA This is one of the Chalcocite crystal groups saved by enlightened specimen collecting...Himalaya Mine, Mesa Grande, San Diego County, California, USA San Diego County doesn’t just raise Avocados and |
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| Mayo marble quarry Renfrew–Madawaska area Renfrew County Road 4 (Bruce Avenue) roadcut Highway 60 quarry...Addresses for maps and reports 169 Mineral and rock displays 170 References 184 Glossary 240 Chemical...246 Index of mines and occurrences Table 4 1. Rock formations referred to in text Figure 2 viii ...Most of the collecting localities are in Renfrew County, Ontario. A wide variety of minerals are found...quartz, graphic granite, and corundum from Renfrew County; feldspar (peristerite, amazonite), jaspilite, |
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| long and 18 mm wide. National Mineral Collection specimen no. 014046. Photograph by G. Lemieux, Geological...crystal is 33 mm across. National Mineral Collection specimen no. 33402. Photograph by G. Lemieux, Geological...Addresses for maps and reports 213 Mineral and rock displays 214 References 241 Glossary 297 Chemical...302 Index of mines and occurrences Table 4 1. Rock formations referred to in the text Figures 2 3...feldspar porphyry, and chrome-muscovite (fuschite) rock. Inactive mines and prospects constitute most of |
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| .......................11 The Ledge (Charlotte County Granite) quarry.........................................................................63 Split Rock, Marble Cove mines......................................................................136 Black Rock occurrence ...........................................................................181 Admiral Rock quarries........................................................................197 viii Black Rock mine........................................... |
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| Middle European » Jurassic. blation. The removal of rock debris by wind action. boral. » Echinodermata (Echinoids)...(Echinoids) and Fig. 44. rasion. Reduction in size of rock particles by mechanical wearingway, especially by...equivalent. “te Accessory minerals. Minerals present in a rock in such small amounts that their presence or absence...cicular (mineralogy). Needle-like. eid rock. An igneous rock with 10% or more free quartz. The term arises...were regarded as salts these acids. If therefore a rock contained excess silica, it was 15 regarded as |
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| mine Witless Bay shoreline occurrences Midnight Rock Wabana mine Foxtrap mine Manuels River occurrence...Purbeck’s Cove quarry Flat Water Pond chrome-mica rock occurrence Rambler mines Deer Cove occurrence Goldenville...Pond Cow Head occurrences Stearing Island, White Rock Islets Parsons Pond oil Newfoundland Zinc mine Port...Montagne, Île du Havre Aubert Crenulated gypsum-bearing rock, Collines de la Demoiselle Avalon shoreline near...Trans-Canada Highway Barite vein cutting volcanic rock, Trans-Canada Highway Tabular barite crystals, Trans-Canada |
