 | | Journal (article/letter/editorial) | | Article Late Tertiary Petrified Wood from Nevada, USA: Evidence of Multiple Silicification Pathways...Western Washington University, Bellingham, WA 98225, USA; E-Mail: mustoeg@wwu.edu; Tel: +1-360-650-3582 Academic...Abstract: Late Tertiary fossil woods from the state of Nevada provide an opportunity for observing the mineralization...variations, several trends are evident. Features in Nevada specimens suggest that two fundamental processes...hydrothermal precipitation may produce opal, chalcedony, and quartz as deposits within a single cavity |  | | Journal (article/letter/editorial) | | Western Washington University, Bellingham, WA 98225, USA; mustoeg@wwu.edu Abstract: For many decades, wood...silicification; fossil wood; opal-A; opal-CT; chalcedony; quartz 1. Introduction Citation: Mustoe, G...crystallization (opal-C/opal-CT); microcrystalline quartz (chalcedony) is considered to be the result of diagenetic...from Red Hills Lignite Mine, Chocktaw, Missouri, USA. The multilayered architecture of the cell walls...exposure (e.g., some precious opals from Virgin Valley, Nevada, USA) owe their fragility to relatively high |  | | Journal (article/letter/editorial) | | uranium deposits in northwestern Nevada and southeastern Oregon, USA Stephen B. Castor ) , Christopher...NV 89557, USA Received 14 June 1999; accepted 24 September 1999 Abstract Northwestern Nevada and southeastern...hosted by peralkaline rocks in the McDermitt and Virgin Valley calderas. At McDermitt, major deposits are along...uraninite, coffinite, chalcedony, opal, and numerous sulfides. At Virgin Valley, deposits are mostly in...numerous sulfides. Minor U occurrences at Buff Peak, Nevada, the newly recognized, westernmost topaz Žperaluminous |  | | Journal (article/letter/editorial) | | quartz (smoky, colorless, black basanite, reddish chalcedony, brownish jasper) and sea shells (white, brown)...lustrous black magnetite. Madison is in S/E New Haven County of southern Connecticut near Long Island Sound...chiefly of quartz (colorless, smoky, brownish, red chalcedony), with a 594 small amount of feldspar (gray...and silvery muscovite. Bureau is in S/E Bureau County of northern Illinois. Dune sand from Great Bend...of quartz (colorless, smoky, reddish, reddish chalcedony), white and pale reddish feldspar and a tiny |  | | Book | | A FIELD GUIDE Rockhounding Nevada is a must-have book for anyone interested in collecting rocks, minerals...Globe Pequot Press NEVADA A Guide to the State’s Best Rockhounding Sites NEVADA 2nd Edition Essential...jasper, fossils, fluorescent minerals, obsidian, chalcedony, wonderstone, malachite, petrified wood, limb...and minerals WILLIAM A. KAPPELE Rockhounding Nevada RockhoundingNV 3pp.indd 1 6/27/11 3:02 PM Help...RockhoundingNV 3pp.indd 2 6/27/11 3:02 PM Rockhounding Nevada A Guide to the State’s Best Rockhounding Sites |  | | Journal (article/letter/editorial) | | Western Washington University, Bellingham, WA 98225, USA; mustoeg@wwu.edu; Tel.: +1-360-650-3582 Received:...mineralized with polymorphs of silica: opal-A, opal-C, chalcedony, and quartz. Less familiar are fossil woods preserved...that contains quartz-filled fractures (Washington, USA) to silicified wood that contains abundant copper...Western Washington University, Bellingham, Washington, USA. Specimen photos provided by other researchers are...running Genesis software (EDAX, Mahwah, New Jersey, USA) and X-ray diffraction patterns performed with a |  | | Journal (article/letter/editorial) | | Rehoborh Beach, Del. Petrified wood sand from Virgin Valley, Ne v. From one of Delaware's popular beaches...white sea shells. Rehoboth Beach in eastern Sussex County in S.E. Delaware is on the Atlantic Ocean. "Here..."Here is another sand sample from Virgin Valley, Nevada. This is ant hill sand from halfway up a mountain...mountain. This is several miles down the valley from the carnelian area, that I sent you a sample of before...sand from Naples, Fla. Naples, in N . W . Collier County in southern Florida, is on the Gulf of Mexico. |  | | Journal (article/letter/editorial) | | Western Washington University, Bellingham, WA 98225, USA; mustoeg@wwu.edu; Tel.: +1-360-650-3582 Received:...wood from the Yellowstone National Park, Wyoming, USA; no relict tissue was visible in silicified alder...or from unidentified fossil wood from New Mexico, USA; two taxonomically unidentified samples from unknown...the same specimen. A fifth specimen, from Kansas, USA, was mineralized with calcite; treatment with hydrochloric...transverse orientation. Devonian, Woodford Shale, OK, USA. This new thin section is similar to the specimen |  | | Journal (article/letter/editorial) | | Article 2 Near infrared signature of opal and chalcedony as a proxy for their structure and formation...MANGOLD 1 4 Abstract: Opal-A, opal-CT and chalcedony develop in various geological environments mainly...spectroscopic criteria distinguish opal-A, opal-CT and chalcedony: the apparent maximum of the absorption at 5200...28 29 30 31 32 33 34 35 36 37 38 39 Opals and chalcedony are different types of opaline silica found in...with fluid circulation, usually water. Opals and chalcedony, as hydrated minerals, record this involvement |  | | Book (edition) | | Hall Co. Horshaw mine, Racooche Valley, White Co. 1866 Vs White County Daniel Light form, % mi. NE ...Alabama has yielded a 4i%4 carat diamond from Shelby County, 30 miles south of Birmingham, found about 1900...Siding in St. Clair County, 20 miles northeast of Bir- mingham. One found in Lee County in 1901 weighs 4^...have a cornfield at Pounding Mill, Tazewell County, Va. A 3 carat stone, bought by a Knoxville...Luttrell, Another of .78 carat, light yellow, Union County. was reported found in 1888 on the Henry Burris |  | | Report (issue) | | find lives on. The contention that the Virgin Valley (Nevada, USA) opal deposits were discovered by Chinese...the beads are accurately described as agate, chalcedony, white and green quartz, steatite, and several...waterwheel-powered agate mills along the Idar stream in the valley below Kirsch weiler, and their lives were about...head at the University of Rochester in New York (USA). According to his records, Dr. Alling obtained the...mine. Lower: A nicely split boulderfrom the Hidden Valley mine reveals precious opal with nice play ofcolor |  | | Journal (article/letter/editorial) | | 98225, USA Department of Geological Sciences, 1272 University of Oregon, Eugene, OR 97403, USA; macosta@uoregon...colorant for bright green fossil wood from Arizona, USA and Zimbabwe, Africa. Complex color patterns result...Arizona, USA, and red and green wood from the Eocene Clarno Formation at Hampton Butte, Oregon, USA. Other...Other specimens came from Nevada and Oregon, USA, and Zimbabwe and Madagascar, Africa. 2. Metallic Elements...Silicified wood can be mineralized with opal, chalcedony, or microcrystalline quartz. In pure form, these |  | | Report (issue) | | MINERALS OF NEVADA MINERALS OF NEVADA Peer Hen By CASTOR oan eGORY.C.oFER DOCK NEVADA AND BUREAU... UNIVERSITY Reno & Las Vegas OF NEVADA PRESS GEOLOGY Nevada Bureau of Mines and Geology Special...University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs...Districts and significant mineral occurrences of Nevada by Nevada Bureau of Mines and Geology All rights reserved...Cataloging-in-Publication Data Castor, Stephen B, Minerals of Nevada / Stephen B. Castor and Gregory C. Ferdock.— Ist |  | | Journal (article/letter/editorial) | | 31 December 2014 NEVADA MINERAL STEVEN PULLMAN 1755 Circle Drive NW Reno, Nevada 89509 RICHARD THOMSSEN...THOMSSEN P.O. Box 1656 Carson City, Nevada 89702 Map showing Nevada counties, by William W.Besse. N evada...minerals new to the state being identified every year. Nevada is one of the few western states without a published...Paao ama, Clark County. Walt Lombard0 specimen, Jeff Scovil photo. Churchill County Chalk Mountain District...Quartz, 14.2 cm across, Newbeny Mountains,Clark County. Steve Scott specimen, Jeff Scovil photo. Figure |  | | Report (volume) | | Charles Sheldon Wilderness Study Area, Humboldt and Washoe Counties, Nevada, and Lake and Harney Counties, Oregon...Charles Sheldon Wilderness Study Area, Humboldt and Washoe Counties, Nevada, and Lake and Harney Counttes, Oregon...Charles Sheldon Wilderness Study Area, Humboldt and Washoe Counties, Nevada, and Lake and Harney Counties, Oregon...appraisal of the Charles Sheldon Wilderness Study Area, Nevada and Oregon, by R C Greene (B) Interpretation of...graVIty data, Charles Sheldon Wilderness Study Area, Nevada and Oregon, by Donald Plouff (C) Geochemical evaluation |  | | Book | | and quartz the favorite gem- tention to other chalcedony gems The agate also. is gem of America....form of chalcedony. known how not is among the popular impression rockhounds that chalcedony agate... In the general opinion of most collectors, chalcedony and the color is is usually concretionary...shall make it a practice to call all forms of chalcedony grades agate, all minerals (and nearly all...brecciated or conglomeration of cemented pebbles chalcedony, and is pudding stone in the gem trade. trations |  | | Report (volume) | | streambeds, principally derived from rocks of the Sierra Nevada. Specific localities in California where diamonds...Del Norte County; Trinity River, Trinity County; Spanish Creek and Gopher Hill, Plumas County; Placerville...Dorado County; Cherokee Flats, Yankee Hill,and Oroville, Butte County; French Corral, Nevada County; Indian...Indian Gulch and Volcano, Amador County; and Alpine Creek, Tulare County. Other western localities are:...Diamond Basin, Ada County, Idaho; Curry County, Oreg.; and Nelson Hill, near Glacier County, Mont. The Great | | | Report (issue) | | MINERALS OF NEVADA MINERALS OF NEVADA STEPHEN B. CASTOR and G R EGOR Y C . F E R D OC K l NEVADA BUREAU...association with the UNIVERSITY OF NEVADA PRESS Reno & Las Vegas Nevada Bureau of Mines and Geology Special...University of Nevada Press, Reno, Nevada 89557 USA Copyright© 2004 by Uni versity of Nevada Press Photographs...Districts and si gnificant minernl occurrences of Nevada by Nevada Bureau of Mines and Geology All rights reserved...-Publ ication Dat,i Castor, Stephen B. Minerals of Nevada/ Stephen B. Castor and Gregory C. Ferdock.- rst | | | Book | | p op11lar impression amon g rockhot1nds that chalcedony is a form of agate, ust1ally a term t1 sed specifically...the reverse js tr11e, for agate is a forn1 of chalcedony. It is n ot kno,vn how this word (pronot1nced...jasper, or conglomeratio11 of cemented pebbles in chalcedony, and is called pudding stone in the gem trade...snuff bottle with streamers of milky quartz in chalcedony. Cutting through the ends of the streamers giver...literah1re, and most of these varieties l1ave bee11 chalcedony and cuttable for gems. It seems relatively safe |  | Pan, Yuanming, Li, Dien, Feng, Renfei, Wiens, Eli, Chen, Ning, Chernikov, Roman, Götze, Jens, Lin, Jinru (2021) Uranyl binding mechanism in microcrystalline silicas: A potential missing link for uranium mineralization by direct uranyl co-precipitation and environmental implications. Geochimica et Cosmochimica Acta, 292. 518-531 doi:10.1016/j.gca.2020.10.017 | Journal (article/letter/editorial) | | Savannah River National Laboratory, Aiken, SC 29808, USA c Canadian Light Source, University of Saskatchewan...resonance (EPR) spectroscopy. Agates (banded chalcedony) are composed of microcrystalline, parallel grown...the Miocene Virgin Valley Formation, Nevada, USA (Zielinski, 1982). Opal-2 from Nevada County, California...California, USA (Table 1) consists of a brownish band and a white band (Fig. 1A), and is hereafter divided into...Opal-2w). Agate-1 from the Dryhead area, Montana, USA (Fig. 1B and C), occurs in sedimentary layers of |  | | Journal (article/letter/editorial) | | one of the foremen of an interesting occurence in Nevada, near Annie Loke, just across the line from Fort...refreshing in contrast ro the s~m& heat of Fwl IDv& Valley, we continued on to Glass Mt. As I am no geologist...harvest was much earlier in the Fall IDver Valley, Shasta County, Calif., through which I passed, and so...Surprise wheels, and carrying poles to make Valley (of Modoc County, Calif.) to a corduroy road to get back...sitting in the shade and ed up in the desert in Lake County, resting while I got the car out of the Oregon |  | | Journal (issue) | | Collettion of Opals. By Tltomwi Jr. Ffuhr, A.JC Opa ls m Virgin Vall<')', X l',·ncla. By flr. 11. C. Dake. . ....Tradition tells us that l\Iine Ln :\fotte, in ll'adison County, )lissouri, wns first worked by the Spaniards,...kangaroo discovered a bright bit of opal fl.oat in the county of Yungnulgra about sixty-five miles northwest...at Kandir and Kodegaon . Opals are f ound with chalcedony, carnelian, and amethyst near H yderabad City...does not form as quartz, b ut as either opal or chalcedony. Opal is also n ot infrequently common in the |  | | Book (edition) | | describes sites under of the nearest town and county. and the many maps included book contain such...nodule may contain a center of surrounded by chalcedony easily discernible quartz crystals that crystalline...mass. Tenacity is a quality closely allied chalcedony and jasper, because of their makeup, are tougher...granite except and cools, gas pockets may be chalcedony or opal, de- dissolved from the lava. Similarly...northern Idaho. the cells with silica, or a cast of chalcedony space left Two other formations create conditions |  | | Book | | fund of information on the subject of agates, chalcedony, and petrified woods, and these chapters were...uartz xiii . . . 13o Contents Agate —Chalcedony Chapter X 157 Chapter XI Geodes and Thunder...Agate-filled Nodule 224 Coral Petrified by Chalcedony 229 Phantom-quartz Crystal 236 Etched-quartz...well-developed quartz crystals found in Herkimer County, New York. Again the terms "Medfordite" and ""Oregonite"...Perhaps nowhere do fine "deposits" of agate and chalcedony occur in greater abundance or of better quality |  | | Book | | River-Platte River * Nevada Fossil-Ichthyosaur Metal-Silver Precious Gemstone-Virgin Valley Black Fire Opal...made the “Magic City” of Birmingham, Jefferson County “The Pittsburgh of the South” during the turn of...feet thick, occurs near Sylacauga, in Talladega County, being fine-grained and mostly white, ofexceptional...white Sylacauga marble from Sylacauga, Talladega County, is considered among the finest white marble in...the Lincoln Memorial. Marble from Chewacla, Lee County, near Auburn, Alabama, is a coarse grained dolomite |
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Unnamed Carnelian deposit, Virgin Valley, Humboldt County, Nevada, USA