| | Journal (article/letter/editorial) | 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 āEarly, Middle, and Lateā 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) | DIKES OF MOUNT ROSA COMPLEX AREA, COLORADO FRONT RANGE, COLORADO, USA SARAH L. HANSONĀ§ Adrian College,...Madison Street, Adrian, Michigan 49221, USA, GARY ZITO Colorado School of Mines, Metallurgical and Materials...Department, 1500 Illinois Street, Golden, Colorado 80401, USA Keywords: pegmatite, beryllium mineralization...alteration, phenakite, bertrandite. INTRODUCTION The Mount Rosa Complex (MRC), located in the Colorado Front...the Pikes Peak Granite (PPG), the most abundant rock unit in Mount Rosa Complex. The remainder of the | | | Journal (article/letter/editorial) | Mineral Localities of Colorado EDWIN J . OVER, JR. "Second Edition " is a feature which reruns pertinent...D E A C O L L E C T I N G trip to Mt. Antero, Colorado, long famous for its aquamarines and associated...minerals: Aquamarine Bertrandite Fluorite Mica Phenakite Quartz My camp was at a prospector's cabin, at...loose slide rock which covers most of the country above timberline. Traveling over this loose rock is dangerous...900 feet, etched aquamarine crystals, very good phenakite crystals, and some rather poor bertrandite crystals | | | Journal (article/letter/editorial) | COLORADO TOPAZ Topaz, Al Si0 (F,OH) is one of Colorado's better known gem minerals. Though ColĀ 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 | | | Book (edition) | MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive Ā„em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...highways. Latest information is given on local tra\'el and collecting conditions and land ownership, so...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =Ā· - Ā·, BOOKS BY RICHARD M. PEARL...PEARL Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak | | | Book (edition) | ā _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ā : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Trails and Mineral Guide Colorado Rocks, Minerals, Fossils Americaās Mountain: Pikes Peak and the Pikes...Nature As Sculptor: A Geologic Interpretation of Colorado Scenery Guide to Geologic Literature Popular Gemology...Gemology Mineral Collectors Handbook Colorado Gem Trails The Art of Gem Cutting (With Dr. H. C. Dake)...Dake) * RICHARD M. PEARL ā
COLORADO GEM TRAILS AND MINERAL GUIDE ā
SKETCH MAPS BY MIGNON WARDELL PEARL | | | Journal (issue) | 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...ābruisedā area in the center which resulted from the specimen falling on my hard hat as it was being pried off...off the back. āThe 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. āBy afternoon, we left the | | | Journal (article/letter/editorial) | inch on edge, from the Henderson mine, Clear Creek County. Figure 2 (right). Green fluorite encrusted with...Mountain Wilderness area near Columbine Lake, La Plata County; largest crystal measures 1.25 inches on edge;... FLUORITE BARBARA L. MUNTYAN Ouray County Museum Ouray, Colorado 81427 Mineral photographs by John R...locations in Mexico; in Elmwood, Smith County, Tennessee, and in Hardin County, Illinois, in the United States;...eastern Russia. It also occurs in many localities in Colorado, where it is found in colors ranging from pale | | | Journal (article/letter/editorial) | Contributed Papers in Specimen Mineralogy: Part 2 46 RMS program cover by Susan Robinson th THE THIRTY-SIXTH... GOLD FROM THE WILD AMMONOOSUC RIVER, GRAFTON COUNTY, NEW HAMPSHIRE. J. S. Genga, C. B. Handler, and...Placer gold deposits in localities that are hosted by rock that has experienced less overall reworking, such...FROM THE WILD AMMONOOSUC AND BAKER RIVERS, GRAFTON COUNTY, NEW HAMPSHIRE. C. B. Handler, J. S. Genga, and...occur over geologic time, as placer-concentrated rock sheds sediments that are themselves concentrated | | | Report (volume) | Minerals of Colorado: A 100- Year Record By EDWIN B. ECKEL GEOLOGICAL SURVEY BULLETIN 1 1 14 A...knowledge____________________________________ Future of Colorado mineralogy______________________________________...mineral localities and metallic mineral deposits of Colorado ________________________________ In pocket III...mineral localities and metallic mineral deposits of Colorado, has not been included in this reprint. Many of...especially Fischer and others, 1946). MINERALS OF COLORADO: A 100-YEAR RECORD By EDWIN B. EcKEL ABSTRACT | | | Report (issue) | Denver, Colorado, USA Ā© 2011 by Lithographie, LLC P.O. Box 11613 ā¢ Denver, CO 80211 ā¢ 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 | | | Journal (article/letter/editorial) | was born in Missouri in 1903. We first came to Colorado in 1908, but I donāt remember much about that...several times in the next few years. When visiting Colorado, my family always stayed at the Iron Springs Chateau...those in my cabinet. In 1920, when we moved to Colorado Springs from Missouri, a friend, about my age...agates and carnelian from Austin Bluffs here in Colorado Springs. Shortly after that I met Willard Wulff...Museum of Nature and Science 2001 Colorado Boulevard Denver, Colorado 80205 Unless otherwise noted, all | | | Journal (issue) | 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 | | | Journal (article/letter/editorial) | claim, Pikes Peak batholith, Teller County. The Collectorās 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 stateās minerals is Colorado Rockhounding, by Voynick (1994). Other published | | | Journal (article/letter/editorial) | Although Colorado may be most noted for rhodochrosite or amazonite, the many varieties and associations...a k e w o o d , Colorado 80225 DIANNE L. K I L E 333 S a l e m Street Aurora, Colorado 80011 C O L O...and J. A. MurĀ phy for an update to Minerals of Colorado: A 100-Year Record (Eckel, 1961). 374 ROCKS... Quartz was a familiar gemstone to many early Colorado residents, as documented by an extensive body...body of literature. The first published list of Colorado mineral localities (inĀ cluding quartz) was included | | | Book (volume) | A Location Guide for Rock Hounds in the United States Collected By: Robert C. Beste, PG 2014 Fourth...Fourth Edition A Location Guide for Rock Hounds in the United States Published by Hobbit Press 2435 Union...printing December, 1996 ii A Location Guide for Rock Hounds in the United States Table of Contents Page..............................................59 Colorado ................................................................389 iii A Location Guide for Rock Hounds in the United States Page Ohio ........ | | | Journal (issue) | 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 | | | Journal (issue) | Uwharrie Wildlife M anagem ent A rea, M ontgom ery County, North Carolina. T he major crystal m easures 6...mineralogy professors are not, and have never been, specimen oriented. In the early history of the science...reward for me. KEITH PROCTOR 88 RAVEN HILLS CT. COLORADO SPRINGS, CO. 80919 PHONE: 303-598-8805 (Private...the Burlington mine near Jamestown, Boulder County, Colorado. We found perhaps a dozen good specimens,... MINERAL SPECIES: Country: State or Province: County: N earest Town: M ine Name: O ther Inform ation: | | | Book (volume) | A Location Guide for Rock Hounds in the United States Collected By: Robert C. Beste, PG 1996 Second...Second Edition A Location Guide for Rock Hounds in the United States Published by Hobbit Press 2435 Union...63125 December, 1996 ii A Location Guide for Rock Hounds in the United States Table of Contents Page..............................................47 Colorado ................................................................333 iii A Location Guide for Rock Hounds in the United States Ohio ............. | | | Book (volume) | A Location Guide for Rock Hounds in the United States Collected By: Robert C. Beste, PG 2005 Third Edition...Edition A Location Guide for Rock Hounds in the United States Published by Hobbit Press 2435 Union...63125 December, 1996 ii A Location Guide for Rock Hounds in the United States Table of Contents Page..............................................47 Colorado ................................................................333 iii A Location Guide for Rock Hounds in the United States Page Ohio ........ | | | Book (volume) | SOUTHWESTERN QUADRANT Arizona, Arkansas, California, Colorado, Louisiana, Nevada, New Mexico, Oklahoma, Texas...Southwestern Quadrant Arizoni, Arkansas, California, Colorado, Louisicna, Nevada, New Mexico, Oklahoma, Texas...Location Numbers Arizona Arkansas California Colorado 258 Louis B30 ana HOW TO USE THIS BOOK...volumes, through very precise directions and accurate county maps, to get you to the best and most accessible...for the county in which it is located. This site number also appears under the given county in the text | | | Book | only a small number ā some 40-50 ā are generally rock-forming, e.g. quartz, felspar, mica, pyroxene, amphibole...of various rocks, and in consequence are called rock-building minerals. System of Mineral Classification...largest part of the gases and vapour escapes through rock fissures and cracks to the surface of the earth...weather- ing are gradual, irrevocable and continuous. Rock surfaces are mechanically affected by changing temperature...Biological processes can also produce changes in rock surfaces. The effects of weathering can cause profound | | | Book | only a small number ā some 40-50 ā are generally rock-forming, e.g. quartz, felspar, mica, pyroxene, amphiĀ...of various rocks, and in consequence are called rock-building minerals. System of Mineral Classification...largest part of the gases and vapour escapes through rock fissures and cracks to the surface of the earth...weatherĀ ing are gradual, irrevocable and continuous. Rock surfaces arc mechanically affected by changing temperature...Biological processes can also produce changes in rock surfaces. The effects of weathering can cause profound | | | Catalog/List | localities. Of particular note is an exceptional Sulfur specimen from Italy ā a tremendously large crystal on matrix...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 doesnāt just raise Avocados and...Dam Mountains, Washington County, Utah, USA Distinctively unique as a specimen can be, this Azurite and | | | Journal (issue) | 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 āthe Wreath,ā 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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Specimen Rock, El Paso County, Colorado, USA