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| From Area of Grand County, ’ .” Grand Junction,Colorado 61slaa Limb casts, probably of conifer...prolifically in the Yellow Cat area of Grand County, Utah, are among the world’s most beautiful examples...southeast. Mining History Yellow Cat is part of the Thompson uranium/vanadium district, which also includes...stages of her research (Cannon 1964). Vanadium Ores Mining & Milling Company worked claims in 1912 for vanadium...until 1939 vanadium ore was mined sparingly in the district, but it became a strategic metal in the late 1930s |
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| TRIP: Mulligan Peak (AZ) Purple Agate Collecting Quartz in Brazil Bob Jones’ 2014 Tucson Experience .............................12 by Bob Farrar A quartz crystal-hunting adventure in Brazil Yellow menace...Peak Purple Agate ......................38 Chalcedony beds in Southeast Arizona by Grant Curtis Tucson...8 - 10, 2014 Benitoite, Joaquinite & Neptunite San Benito Co., CA Watercolor by Frederick C. Wilda©...Springs Mineralogical Society; Western Museum of Mining and Industry; 225 North Gate Blvd.; Fri. 9-5, Sat |
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| rockngem.com U S $6.99 ... and Much More PRINTED IN USA 2 www.rockngem.com From the Editor EDITORIAL................. 30 A drive through New Mexico’s mining history by Steve Voynick Minnesota Minerals and......................................... 54 Chalcedony beds in Southeast Arizona by Grant Curtis 58 Keokuk...branches aesthetically out of a mass of white quartz. This specimen is from California, which is currently...BOTTOM RIGHT: More common minerals like calcite and quartz complement the exotic species like fine zeolites |
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| PENTZ QUARRY SONOMA COUNTY . HUMBOLDT COUNTY EEL RIVER BEAR CANYON CREEK TRINITY COUNTY 8 9 9 9 9 10 II...................................... 20 21 LAKE COUNTY ................................................................................... 21 MONTEREY COUNTY ..................................... 21 BIG SUR............................................... 23 SAN SIMEON AND CAMBRIA .... 23 INYO AND MONO COUNTIES... HIGH SIERRA GEM STONES Inside Back Cover INYO COUNTY COLLECTING 28 ONYX DEPOSIT.................... |
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| 30-Dec. 1—Third annual gem and mineral show of San Fernando Valley Mineral and Gem society, North Hollywood...by collectors of Riverside, Los Angeles, San Bernardino, San Diego and Imperial counties. Information...from Desert Magazine readers . Current news briefs MINING Here and There on the Desert NEWS Rules for December...the little known canyon wilderness of southeastern Utah where the terrain became too rugged even for a packtrain...DarkCanyon By RANDALL HENDERSON THE map of southeastern Utah where Dark canyon tumbles out of the Abajo mountains |
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| triclinic prismatic crystals white calcite e in the USA, Chile, and Russia. PICTURES shades of blue Photographs...each entry. quartz phenocryst GRAIN SIZE Less than 2mm. ESSENTIAL COMPONENTS Quartz, feldspars. ADDITIONAL...small phenocrysts, often light beige matrix of quartz, or it may contain spherical structures. darker...and augite. With the addition of small amounts of quartz and alkali feldspar it becomes a granodiorite;...occurs in neisses, and associated hydrothermal quartz matites. vitreous lustre COMPOSITION Silicate |
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| Finds ................ Fairburn Type Agate Blue Chalcedony .... Tourmaline ............... Selenite.......Barite ................... 8 9 11 ARDMORE AGATE BEDS 11 OELRICHS AGATE BED .. 12 THE CUSTER AREA............. Black Agates..................... Chalcedony ..................... THE BADLANDS ............Fossils 58 WISCONSIN 59 LAKE SUPERIOR-GOGEBIC DISTRICT 59 Gems and Specimens . 59 Gems .69 69 69 69...Mary Ellen jasper, pyritized snails, or blue chalcedony. Why weren’t they in the first edition? Simply |
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| Interlayered hornblende gneiss, amphibolite, and biotite-quartz-plagioclase gneiss........... Garnetiferous schist...................................... Microcline-quartz-plagioclase-biotite gneiss unit.. Intcrlayered................................... Garnetiferous quartz-biotite schist.................. Igneous rocks................................... 6 Thickness of beds between fossil zones of the Pierre Shale..........HORN ABSTRACT The Golden quadrangle, Jefferson County, Colo., lies at the western edge of the rapidly |
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| Director A Division of New Mexico Institute of Mining and Technology Stirling A. Colgate, President ...diorite porphyry Quartz diorite porphyry Biotite granite Quartz veins Summary Quartz porphyry Monzonite...110 RIO HONDO DISTRICT 110 Geology, mineralization, production 111 RED RIVER DISTRICT 111 General geology...ELIZABETHTOWN-BALDY DISTRICT 120 Hematite Creek district 121 West Moreno district 121 Elizabethtown-Baldy...Rio Hondo hornblende granite, Oligocene (34 m.y.) quartz diorite porphyry, and early Miocene (23 m.y.) Questa |
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| Flatirons Facets Flatirons Mineral Club of Boulder County, Colorado Volume 61, Number 5 The Flatirons Mineral...talk on the Colorado‐Wyoming Stateline Kimberlite District. Phil recalls finding pyrite at an outcrop near...minerals he found in the Franklin and Sterling mining district. (See the July‐ August newsletter for more...Golden. The diamonds in the Stateline Kimberlite District were first discovered in 1975, when a saw was...than 15,000 carats were recovered, placing the district ahead of Murfreesboro, Arkansas, as the top producer |
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| __ _ 123 Gas Hills district __________________________ _ 123 Crooks Gap district ________________________...40. Interlaminated white .shale and dark-brown chalcedony in type section of Moonstone Formation__ 41....mine__________________________ 58. Photograph showing Cheyenne Mining Co. uranium strip mine in upper part of Wagon Bed...uranium deposits and in many places contains coal beds of minable thickness. humed and their Cenozoic sedimentary...mudstone ; the chert-pebble conglomerate. Many coal beds are present in the Niland Tongue and older strata |
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| which include flanking beds of sandstone and conglomerate and dolomite-chalcedony beds showing evidence of...mainly m e d i u m - t o coarse-grained, generally quartz-rich but arkosic in parts. They are d o m i n a...thick in which sandstone beds are separated by silty partings and by thin silty beds up to 10 cm thick, Upper...Upper surfaces of the sandstone beds c o m m o n l y show current or wave ripples, often in interference...throughout the sandstones are thin conglomerate beds involving both exotic pebbles and m u d s t o n |
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| Museum, Madison Avenue, Albany, New York 12230, USA †Oklahoma Museum of Natural History and School of...University of Oklahoma, Norman, Oklahoma 73072, USA ‡Instituto de Geologia, Universidad National Automona...flank either by Cretaceous limestone or Tertiary red beds (see Centeno-Garcia & Keppie, 1999, fig. 3, for...are increasingly faulted, folded, intruded with quartz veins and hydrothermally bleached toward the thrust...the Rı́o Salinas is a thin (to 15 cm), lenticular quartz arenite overlain by an equally thin, flat pebble |
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| Plate A. E. Foote. X. ; 56 . cens-zone (Naples beds) of Western IX. Alcohol on the Browning Washington...T. W. Stanton XV. — Iron Ores of the Marquette District of Michigan; by C. R. Van Hise XVI. — Illustration... Mineralogical Notes on Brookite, Octahedrite, Quartz 329 and Ruby by G. F. Kunz ; Appendix. — XLIII...History. Note on distribution of upturned Cretaceous beds of Brit. America, G. M. Dawson, 433. Preliminary...Mineralogy and Petrography, W. S. Bayley Gay-lussite from San Bernardino Co., Cal., H. G. Hanks, 540. — — — |
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| Plate A. E. Foote. X. ; 56 . cens-zone (Naples beds) of Western IX. Alcohol on the Browning Washington...T. W. Stanton XV. — Iron Ores of the Marquette District of Michigan; by C. R. Van Hise XVI. — Illustration... Mineralogical Notes on Brookite, Octahedrite, Quartz 329 and Ruby by G. F. Kunz ; Appendix. — XLIII...History. Note on distribution of upturned Cretaceous beds of Brit. America, G. M. Dawson, 433. Preliminary...Mineralogy and Petrography, W. S. Bayley Gay-lussite from San Bernardino Co., Cal., H. G. Hanks, 540. — — — |
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| Massachusetts 02108, USA 667 Lytton Avenue, Palo Alto, California 94301, USA 107 Barry Street, Carlton...Carlton, Victoria 3053, Australia DISTRIBUTORS USA and Canada Blackwell Scientific Publications Inc. PO...directly to CCC, 27 Congress Street, Salem, MA 01970, USA. 0305-8719/86 $02.00. Printed in Great Britain by...totally arbitrary level within relatively thin barren beds between his fossiliferous levels. Such a procedure...unequivocally regarded as the base of the Buildwas Beds. Bassett et al. argue strongly that the base probably |
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| deposits in China ... ... ... Section of the Kenkou district, eastern Nanling Section of Shichung, south of...Chuanhsien Hsiang-kuei Gap, showing a the 1? type district, parti of the south-west of the Wuling system...the north of the Luliang Range, and the Paotuh district to the north-west of the same range, may be regarded...the gorge. are formed by Rhietic and Cretaceous beds. These conditions are not repeated in the Central...a valuable coalfield in Valley. the Pinghsiang district, a railway running along this highway is partially |
Chalcedony beds, San Rafael Swell Mining District, Emery County, Utah, USA