 | | Journal (article/letter/editorial) | | agate comes from the top of a mountain in Fulton County, about 5 miles southwest of Elizabeth, Ark. W e...the road."—on label. Elizabeth is in S/W Fulton County in northern Arkansas. CALIFORNIA—Art Tatum. Rock...call it black jasper. Some rockhounds from Kern County here have complete displays with the coal-black...slab of deep black color. They are both basanite (quartz) ; can also be called black jasper. Another name... Bakersfield is in western Kern County in S.W. California. COLORADO—"I got this specimen north of Del |  | | Report (volume) | | Radioactivity in the Metal-Mining Districts of the San Juan Mountains Colorado GEOLOGICAL SURVEY --*_-...Radioactivity in the Metal-Mining Districts of the San Juan Mountains Colorado By C. T. PIERSON, W. F. WEEKS...radioactivity in the metal-mining districts of the San Juan Mountains, Colorado, by C. T. Pierson, W. F..._______________ CeboUa district..______________________________ Upper Uncompahgre district. ______ _________________________...Uranium occurrences___________ ________ __ Bonanza district..____________________ ___________________ General |  | | Journal (article/letter/editorial) | | afalster@mainemineralmuseum.org Muzo-habit Quartz Zigras Mine, Garland County, Arkansas Q uartz, the best known...anorthite, constitutes 39 percent of the crust. Quartz at 12 percent is tied with potassium feldspar (microcline...K-feldspar plus quartz), whereas oceans are underlain by basalts (plagioclase plus pyroxene), so quartz can be...considered a signature mineral of the continents! Quartz occurrences are so numerous that they cannot be...featured twice: rutile-included quartz (Cook 1996) and crystallized rose quartz (Clifford 2012). To support |  | | Journal (article/letter/editorial) | | Museum of Nature and Science 2001 Colorado Boulevard Denver, Colorado 80205-5798 jmurphy @ dmns.org PETER...Survey MS 150, Box 25046 Federal Center Denver, Colorado 80225-0046 pmodresk @ usgs.gov Unless otherwise...to 2000) J oin us for a gemstone tour around Colorado! Our field trip takes us from east to west in...in the same way you may have toured through Colorado on a mineral collecting trip. This route, from the...gemstones are known to occur. We cannot discuss every Colorado gemstone occurrence; rather, this is a general |  | | Journal (article/letter/editorial) | | COLORADO AMETHYST THOMAS C . MICHALSKI U. S. Geological Survey Denver Federal Center Denver, Colorado...present-day mineral collectors are aware that Colorado has any significant amethyst occur rences. Most...Background Amethyst, the purple variety of crystalline quartz, has been admired for centuries because of its...and anomalous biaxial nature of ame thyst (clear quartz is uniaxial) is due to Fe 0 within the lat tice...for its formation, Colorado has many occurrences of this unique variety of quartz. A quick check of the |  | | Report (issue) | | 2001 ° Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic, pseudohexagonal. Point Group:...] X-ray Powder Pattern: Black Jack mine, Idaho, USA; glycolated, di®use pattern. 17.6 (100), 4.42 (100)...Total 99.64 99.93 (1) Black Jack mine, Idaho, USA; corresponds to (Ca0:23 Na0:02 K0:01 )§=0:26 (Al1:96...derived from ma¯c rocks. Association: Plagioclase, quartz, orthoclase, montmorillonite, kaolin, allophane...uncommon. In the USA, from Beidell, Saguache Co., and at Wagon Wheel Gap, Mineral Co., Colorado; in the Black |  | | Report (volume) | | GEOLOGY OF THE SAN JUAN REGION OF SOUTHWESTERN COLORADO BY WHITMAN CROSS AND ESPER S. LARSEN UNITED...____ ______ __.__._._.__ _ ________ Complex of Iron Hill. ___ _ ____...___.__ ___ _ __ Limestone of Iron..._________ ___ __________________________ Theralite and quartz gabbro _ _ _ ___________ _ _.._____.______ Veins..._-_ _____ ____:____ r_ _ _ _ j __ L _____'___ Beidell latite-andesite.__ _______'_!_____________.___'____________...Undifferentiated volcanic rocks of the northern part of the Saguache quadrangle._________________j____________-_____ |  | | Journal (article/letter/editorial) | | Although Colorado may be most noted for rhodochrosite or amazonite, the many varieties and associations...associations of quartz found throughout the state rank it as one of the premier worldwide localities for that...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...for about 750 known mineral species.* Of these, quartz is one of the most desirable from a collector's...to Minerals of Colorado: A 100-Year Record (Eckel, 1961). 374 ROCKS & MINERALS Quartz was a familiar |  | | Report (issue) | | lower talus-covered slopes are underlain by Huerto quartz latite and Alboroto rhyolite. Geology and Petrology...Petrology of the San Juan Region Southwestern Colorado By ESPER S. LARSEN, JR., and WHITMAN CROSS GEOLOGICAL...an area of I2fiOO square miles in southwestern Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...because no suitable base maps of the Cochetopa and Saguache quadrangles were available, these quadrangles...and Hunter worked in the Uncompahgre, Cochetopa, Saguache, Creecle, Del Norte, and Summitville quadrangles |  | | Journal (issue) | | Julius Weber Mamaroneck, New York COLORADO ISSUE #2 Articles Colorado locality index.............................. 323 by B. L. Muntyan What’s new in Colorado minerals? ......................................339 by M. I. Jacobson The San Juan Mountains of Colorado ..................................349 by J. A...AMAZONITE with smoky quartz, 10 cm tall, from the Yucca Hill claim, Park County, Colorado. Richard A. Kosnar...invaluable reference which should provide us with crystal draw ings to illustrate articles for centuries |  | | Book | | MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Sine —_—< ¢ te om At _SHT 40...MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Richard Walker Holmes and Marrianna...Mines and minerals of the Great American Rift (Colorado-New Mexico). Bibliography: p. Includes index...index. 1. Mines and mineral resources—Colorado. 2. Mines and mineral resources—New Mexico. I. Kennedy, Marrianna...minerals of the Great American Rift in New Mexico and Colorado. Great American Rift is the name we use for a |  | | Catalog/List | | DRIVE, SAN JOSE, CALIFORNIA 95127 HALITE - Kern County, California (cavernous crystals) GEM ROUGH & SLABS...permission, then ship your specimens first to us. All crystal specimens on this list are cfioice specimens or...directions. The number is Area Code 408-259-4394. Bring crystal specimens for swapping. mNERAI,OGlcAL RESET+AiRCH...fl. yellow-green. ARAGONITE 3X4 - Sam Benito County, Califo.fnia - White needles groTdrting in radiating...Ilo $2, 3 X 3 $2.75, 4 X 5 $4.50 San Benito County, California - Greenish hexagonal plates (look like |  | | 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 |  | | Book (edition) | | COLO RAD O GEM T RAILS t.lilky quartz crystals, Ow-ay. Katherine H . Jensen. AND MINERAL GUID E RICHARD...MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive ¥em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =· - ·, BOOKS BY RICHARD M. PEARL...PEARL Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak |  | | Journal (article/letter/editorial) | | Center, Denver, Colorado 8022) Volcanic History of the San Juan Mountains, Colorado, as Indicated by...breccias—mainly alkali andesite, rhyodacite, and mafic quartz latite—were erupted from numerous scattered central...activity changed to explosive ash-flow eruptions of quartz latite and low-silica rhyolite that persisted until...composition intertongue with the ashflow sequence: (1) quartz latitic lavas that were erupted in and adjacent...which covers about 25,000 km2 in southwestern Colorado and is well known through the studies of Larsen |  | Collins, Donley S., Cobban, Robert R., Foord, Eugene E., Murphy, Jack A. (1989) Bibliography for update and revision of U.S.G.S. Bulletin 1114, Minerals of Colorado -- a 100 year record, by Edwin B. Eckel, Part A - Paper copy --Bibliography data file disks. Open-File Report Vol. 1989 (89-206) US Geological Survey doi:10.3133/ofr89206a | Report (issue) | | Survey Denver, Colorado Department of Geology, Denver Museum of Natural History Denver, Colorado NOTE FOR...revision of U.S.G.S. Bulletin 1114, Minerals of Colorado A 100 year record, by Edwin B. Eckel By Donley...Prepared in cooperation with Friends of Mineralogy - Colorado Chaptar, and the Denver Museum of Natural History...references dealing with the mineralogy of the state of Colorado. It is part of a more than 10 year effort to update...and revise U.S.G.S. Bulletin 1114, Minerals of Colorado: A 100 year record, by Edwin B. Eckel (1961). |  | | Journal (article/letter/editorial) | | name of beidellite Lo a. clay specimenfrom Beidell, Colorado, which was thought to be a distinct mineral...containing other minerals.The composition of the Beidell specimenwas among the first to be questioned;Grim...However, it is not certain that all samplesof the Beidell specimen were mixtures, and it will be shown later...Nagelschmidt obtained a sample from the original Beidell specimenthat probably contained beidellite. Mineralogists...(t9I7) first called the clay specimenfrom Beidell, Colorado, leverrierite but in 1925 renarnedit beidellite |  | | Journal (article/letter/editorial) | | Twin Falh, fdaho. Beidell,Colorado,U. S. Nat. Mus. No. 93239. Wagon Wheel Gap, Colorado,U. S. Nat. Mus....sample. It seemsclear that the material from Beidell, Colorado, even if purified by hand-picking, is a mixture...Idaho. 8D Beidell, Colorado. Jour. Am. Cer. 50c.,9,94 (1926). 8E Wagon Wheel Gap, Colorado. 8F Nashville...microscopic study to be composed of about thirty per cent quartz, ten per cent ferric iron hydrate, and the remainder...an expanding Iattice, in addition to lines for quartz and ferric iron hydrate. The difierential thermal |  | | Journal (article/letter/editorial) | | AND 6, I~IK ECE Istanbul Technical University, Mining Faculty, Mineralogy-Petrology Division, Maslak...a clay specimen from the type locality in Beidell, Colorado, Ross and Hendricks (1945) redefined beidellite...calculated the structural formula for the Beidell, Colorado sample from the analysis given by Larsen and...sample from the Black Jack Mine, Carson District, Owyhee County, Idaho, has a structural formula of: (Si3...charge. The type locality of beidellite is in Idaho, USA, and the locality has a Cretaceous granodiorite basement |  | | Journal (issue) | | - - - - - - - - - - - Mineral Collections 1n Colorado A Supplement to The Mineralogical Record November-December...at www.MineralogicalRecord.com Frontcover Smoky quartz with amazonite, 11.8 cm, from the "Smithsonian..."Smithsonian packet," Smoky Hawk claim, Florissant, Colorado. Collected in 2008; Dorris Family collection; Jeff Scovi...certificates for mines in the Cripple Creek District, Colorado, in 1898 and 1901. Sponsorship: This special...Collecting in Colorado The Collections: Mel & Pam Bersch Ryan Bowling Ralph Clark Colorado School of Mines |  | | Report (issue) | | Mixed-layer minerals................................. Crystal structure................................................................. Relation of ions to crystal structure........................................composition and the function of various ions in the crystal lattice. The underlying causes for the important...chemical analyses are based on knowledge of the crystal lattice of montmorillonite and related minerals...these formulas the name and the ions forming the crystal lattice are given on one line, and the exchangeable |  | | Journal (article/letter/editorial) | | traditionally been looked upon as a phase of relatively Quartz fixed composition and invariant behavior. The cryptocrystalline...relation to the highJow inversion. Synthesized quartz in the present study, when observed at room temperature...grown are not available. Either the a- or the B-quartz however makes the normal slow transition to cristobalite...apparently a normal, wellCarefully prepared organized crystal. The ne-grained manifestation resulting from synthesesin...made that it is unlikely that tions of such a crystal would be involved in poorly organized mani any |  | | Report (issue) | | ages of volcanic units in the San Juan Mountains, Colorado: Recalculated K-Ar age determinations using...S. Geological Survey, Federal Center, Denver, Colorado 80225 CONTENTS Page Abstract................volcanic stratigraphy of the San Juan Mountains, Colorado.................................3 Table 2.--Recalculated...Tertiary volcanic units of the San Juan Mountains, Colorado..............................4 Appendices Appendix...TERTIARY VOLCANIC STRATIGRAPHY OF SAN JUAN MOUNTAINS, COLORADO (Recalculated ages listed first; old ages listed |  | | Report (volume) | | ............................................. Colorado........................................................................................ 102 District of Columbia ....................................to refer to Geological Survey Bulletin 507, "The mining districts of the western United States," and to...exhausted by mining or quarrying. Deposits of minerals that are widely distributed, such as quartz and calcite...because they occur in sufficient quantity to warrant mining for their usual products, but because they furnish |  | | Journal (article/letter/editorial) | | belongsin this system,but it seemsto differ in crystal strucSoc.Fr. Min',6! p. 253) and Bradley, W' F':...a few contain an excessof Sioz (due to admixed quartz or cristobalite?). of course, these analyses suggest... 515 MONTMORILLONITE morillonite from Beidell, colorado, increase in immersion liquids from 1.575...Magee, S. f . Tomkeieff : Geotr. 24. Leverrierite, Beidell, Colo., E. S. Larsen and E. T. Wherry: J.Wash....25. 26. 27. 28. 29. 30. 31. 32. Leverrierite, Beidell, Colo., Larsen and Wherry: loc. cit. (1917). Beidellite |
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Beidell, Crystal Hill Mining District, Saguache County, Colorado, USA