 | | Report (volume) | | Resources of the Owyhee Canyon and South Fork Owyhee River Wilderness Study Areas, Elko County, Nevada, and...and Owyhee County, Idaho U.S. GEOLOGICAL SURVEY BULLETIN 1719-F ?-**(&' j*r\ Chapter F Mineral Resources...Resources of the Owyhee Canyon and South Fork Owyhee River Wilderness Study Areas, Elko County, Nevada, and...and Owyhee County, Idaho By EUGENE E. FOORD, MICHAEL J. LUESSEN, DIRK S. HOVORKA, JOSEPH L. PLESHA, V.J...RESOURCES OF WILDERNESS STUDY AREASOWYHEE RIVER REGION, IDAHO AND NEVADA DEPARTMENT OF THE INTERIOR DONALD PAUL |  | | Book | | MINERALS^ of Idaho with field trip j& maps by John A.flĀ£.jkwith Gem Minerals of Idaho, designed for...for beginners and for those collectors visiting Idaho for the first time, is a guide to some of the...collecting. garnet diggings of Latah County and the Spencer Opal Mine, charge a digging fee. But most...mineral-forming forces than makes Idaho a gem hunter's para- has experienced more Idaho," a fact that dise. L...MINERAL COLLECTION COVER PHOTOS FROM THE GLEN OPAL Opal a mineral containing various amounts of water |  | Viney, Mike, Dietrich, Dagmar, Mustoe, George, Link, Paul, Lampke, Thomas, Gƶtze, Jens, RƶĆler, Ronny (2016) Multi-Stage Silicification of Pliocene Wood: Re-Examination of an 1895 Discovery from Idaho, USA. Geosciences, 6 (2) 21 doi:10.3390/geosciences6020021 | Journal (article/letter/editorial) | | Wood: Re-Examination of an 1895 Discovery from Idaho, USA Mike Viney 1,2, *, Dagmar Dietrich 3 , George... Poudre School District, Ft. Collins, CO 80526, USA College of Natural Sciences Education and Outreach...Colorado State University, Fort Collins, CO 80526, USA Professur Werkstoff- und OberflƤchentechnik, Technische... Bellingham, WA 98225, USA; mustoeg@wwu.edu Department of Geosciences, Idaho State University, Pocatello...Pocatello, ID 832091, USA; linkpaul@isu.edu Institut fĆ¼r Mineralogie, Technische UniversitƤt Bergakademie |  | | Journal (article/letter/editorial) | | studied, but also in high magnesium clays and opaline cherts. This paper provides a dynamic model for...containing limestones, sepiolite, dolostones and opaline cherts were examined; these represent the entire...and siltstones are affected by silicification (opaline levels formed mainly by selective replacement of...silicification of the sepiolite produced lenticular opaline levels that were locally transformed to quartz...sepiolite becoming completely silicified. The opaline levels clearly preserve the structure of the limestones |  | | Journal (issue) | | mmigration Ol ice. Opal Mines, Wbite Cllifs, New South Wales. Oourte8JI Special Opal Nuinber Granite and...1Iuseum. B y 1rilli<1m F. Foshag The Geology of Opal. By, Oilb rrt Hart.. . . . . . . . . . . . . . ...Quest of the Opal. B!I If. T. Strnng.. . ....................... . . ('(}Jor Play in Opal. B.11, Il. E... . . . . . . . . . . . . . . . . . . . . . 'fbe Opal. JJy E11,qe11e Jr. B1"11k..................... ...Nature, OcĀ·cune11ce anll U se. By ,John Jfe11111.sr Opal from the Columhin Plateau Basnlt F lows of ,vashington |  | | 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) | | low-cristobalite, a structure often shown by other varieties of opal. Spectrochemical studies show that the silica of...Taliaferro (1935) suggested that some specimensof wood opal possessa highcristobalitestructure.Subsequentwork...high-cristobalitein opaline materials, although low-cristobalite may occur in precious opal, semi-opal, and some...1971; Jonesand Segnit,1,97L). We reexaminedthe wood opal specimensin which Levin and Ott (1933) reported...disorderedtridymite structure. In Table 1 typical wood opal X-ray data (1L.46 cm diameter cameras;CuKa radiation) |  | | Report (volume) | | Washington County, Idaho GEOLOGICAL SURVEY BULLETIN Prepared in cooperation with the Idaho Bureau of...QUICKSILVER DEPOSITS NEAR WEISER, WASHINGTON COUNTY, IDAHO By CLYDE P. Eoss ABSTRACT The quicksilver deposits...the general vicinity of Weiser, Washington County, Idaho, were first recognized about 1936. They are...the United States. The mine was operated by the Idaho Almaden Mines Co. through December 1942. As yet...quicksilver deposits near Weiser, Washington County, Idaho, (fig. 7) appear to have been first discovered |  | | Journal (article/letter/editorial) | | condensate Opal/chalcedony, alunite, kaolinite, smectite H2S-bearing steam condensate Opal/chalcedony...Opal/chalcedony H2S-bearing steam and SO2- Opal, cristobalite and HCl-bearing magmatic condensates Neutral-pH chloride...Neutral-pH chloride water Opal/chalcedony Calcite, aragonite Opal/chalcedony Opal/chalcedony Taken from...powdery opaline silica, alunite, and/or kaolinite (Fig. 4b), depending on solution pH. The opaline silica...silica is initially precipitated as replacement opal, but progressively transforms to chalcedony as a |  | | Book (edition) | | great lava flows of Idaho, Oregon and Washington occur the many types of agate, opal and petrified this...mine, Racooche Valley, White Co. 1866 Vs White County Daniel Light form, % mi. NE Less than 1887 ...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 |  | | Journal (article/letter/editorial) | | Tracing the continental diagenetic loop of the opal-a to opal-CT transformation with X-ray diffraction Moritz...Tracing the continental diagenetic loop of the opal-a to opal-CT transformation with X-ray diffraction, Sedimentary...Tracing the continental diagenetic loop of the opal-A to opal-CT transformation with X-ray diffraction Authors...(F. Tomaschek) 1 Journal Pre-proof Abstract Opaline silica forms in a variety of continental deposits...deposits on the Earthās surface. The maturation from opaline silica to quartz is traditionally traced with Xray |  | | Journal (article/letter/editorial) | | Geosciences, Auburn University, Auburn, AL 36849, USA Department of Geology and Environmental Earth Science...Science, Miami University, Oxford, OH 45056, USA; burkeml2@miamioh.edu Correspondence: saundja@auburn.edu;...made from oresfrom fromores thefrom southeastern USA [37] recently, similar genetic interpretations been...generally occur with such gangue minerals as quartz, opal, adularia, and calcite (examples: Sleeper, Round...might be. The western United States of America (USA) in general, and Nevada in particular, hosts numerous |  | | Journal (article/letter/editorial) | | examples from Yellowstone National Park, Wyoming, USA Sean A. Guidry *, Henry S. Chafetz Department of...Rm. 312, University Park, Houston, TX 77204-5007, USA Received 7 June 2001; accepted 29 March 2002 Abstract...National Park, Wyoming, USA. Hot springs that precipitate amorphous hydrated silica (opal-A) are the most abundant...Although once largely regarded as abiotic precipitates, opal precipitated in hot springs is now recognized as...overcoming the affects of kinetic inhibitors for opal precipitation (Birnbaum and Wireman, 1984; Birnbaum |  | | Book | | produces mainly kaolin and silica, often in the form of opal. Diagenesis then convert the soft cuff, mildly silicized...Nevada, have been filled with blue opal (21 cm). Similar blue opal can be found in several other localities...precipitation or through an intermediate stage of opal. The geochemistry of this process is hypothesized...Canyon in Idaho and it is found in relatively few deposits, many of them between Oregon and Idaho. Other...(Bruneau Canyon, Idaho) is found in thunder eggs.Willow Creek Jasper (Eagle, Idaho) is also found in |  | | Journal (article/letter/editorial) | | Miocene Petrified Wood from Central Washington State, USA George E. Mustoe 1, * and Thomas A. Dillhoff 2 1...Bellingham, WA 98225, USA Evolving Earth Foundation, P.O. Box 2090, Issaquah, WA 98207, USA; tdillhoff@evolvingearth...Basalt Group (CRBG) in central Washington State, USA. These fossil localities are well-dated based on...is diverse, with silica minerals that include opal-A, opal-CT, chalcedony, and macrocrystalline quartz...commonly, specimens contain multiple phases. Opal-A and Opal-CT often coexist. Some woods are mineralized |  | | Report (issue) | | Quaternary displacement: the Negro Mag fault (NMF), the Opal Mound fault (OMF), and the Mineral Mountains West...FORGE EGS site B2 A B GB Wasatch Fault Zone B USA B&RP UTAH Area of Southern Terminus of Wasatch... Mineral Mountains West fault zone (MMWFZ), the Opal Mound fault (OMF), and the east-west-trending Negro...crop out in two small areas: one area is north of Opal Mound and the other area is along the northern rim...Corral Canyon (see Kirby, 2019, Plate 1). North of Opal Mound, the east-dipping OMF has exhumed Taf deposits |  | | Report (issue) | | with this andesite in figure 2. Chalcedonic and opaline hot-spring sinter deposits occur over large parts...exposed in the thermal area. Veins and veinlets of opal, chalcedonic quartz, quartz, and calcite cut the...rocks and sediments, as shown in drill core. The opal and chalcedony veinlets are largely restricted to...result is replacement of the silicate minerals by opal or cristobalite, except for relict original quartz...area. The youngest sinter deposits are porous opaline silica that is amorphous by X-ray. With increasing |  | | Journal (article/letter/editorial) | | PrePub Article 2 Near infrared signature of opal and chalcedony as a proxy for their structure and...RONDEAU and NICOLAS MANGOLD 1 4 Abstract: Opal-A, opal-CT and chalcedony develop in various geological...criterion distinguishes the formation process of opaline silica. The originality of this study is based...several new spectroscopic criteria distinguish opal-A, opal-CT and chalcedony: the apparent maximum of the...method quickly assesses the geological conditions of opal formation (on Earth or other terrestrial planets) |  | | Book (edition) | | Price: $3.00. THE OPAL BOOK-by Frank Leechmon, F.G.A. The definitive book on precious opal. Complete information...color, and how to handle and cut. The only complete opal book. Nine gorgeous colar plates. Price only $7...of OREGON e WASHINGTON BRITISH COLUMBIA ā¢ IDAHO BY H. C. DAKE Editor Emeritus, With THE MINERALOGIST...Localities Beaches Map of Oregon Beaches JACKSON COUNTY A Mineral Mecca Mop of Josephine and Jackson Counties...Hyolite Opal In Basaltic Rocks Eagle Point Locality ~hodonite Table Rock Mountain JOSEPHINE COUNTY Josephinite |  | Nuriel, Perach, Miller, David M., Schmidt, Kevin M., Coble, Matthew A., Maher, Kate (2019) Ten-million years of activity within the Eastern California Shear Zone from UāPb dating of fault-zone opal. Earth and Planetary Science Letters, 521. 37-45 doi:10.1016/j.epsl.2019.05.047 | Journal (article/letter/editorial) | | California Shear Zone from UāPb dating of fault-zone opal Perach Nuriel a,b,ā , David M. Miller c , Kevin...Sciences, Stanford University, Stanford, CA 94305, USA Geological Survey of Israel, 32 Yeshayahu Leibowitz...Survey, 345 Middleļ¬eld Road, Menlo Park, CA 94025, USA a r t i c l e i n f o Article history: Received...online xxxx Editor: A. Yin Keywords: UāPb SHRIMP opal fault dating Eastern California Shear Zone a b...fault activity based on UāPb dating of fault-related opal from secondary fault segments within the Eastern |  | | Journal (article/letter/editorial) | | Copyright Ā© 1998 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/98 $19.00 1 .00 Pergamon...University of Michigan, Ann Arbor, Michigan 48109-1063, USA Center for Great Lakes and Aquatic Sciences, University...University of Michigan, Ann Arbor, Michigan 48109-2099, USA 2 (Received July 8, 1997; accepted in revised form...made oxygen isotope analyses of the frustules (opaline cell walls) of diatoms collected live from the...oxygen isotope fractionations preserved in biogenic opaline sediments may have been established during diagenesis |  | | Journal (article/letter/editorial) | | Engineering, Colorado School of Mines, Golden, CO 80401, USA SEAES and Williamson Research Centre for Molecular...the western (South Dakota) and southern (Alabama) USA were investigated. Measured quartz contents of bentonites...mixtures of montmorillonite and opaline silica. Opaline silica (opal-A and opal-CT) occurs in two texturally...montmorillonite coatings, but may show sparse distributions of opal-CT lepispheres. HRTEM has not conļ¬rmed a topotactic...eruption and/or preferential early precipitation of opaline silica on quartz may provide substrates for development |  | | Journal (article/letter/editorial) | | and related minerals from Caverns of Sonora, TX (USA) BOGDAN P. ONAC*, GEORGE VENI** and WILLIAM B. WHITE***...Associates, 11304 Candle Park, San Antonio, TX 78249, USA ***Department of Geosciences and Materials Research...Pennsylvania State University, University Park, PA 16802, USA. ā e-mail: wbw2@psu.edu Abstract: A new mineral...association composed of metatyuyamunite, celestite, opal and several minor crystalline phases has been identiĀ...botryoidal opal coatings. The orthorhombic unit cell of the Sonora metatyuyamunite Ć Opal and celestite |  | | Journal (article/letter/editorial) | | Sandstones in W i s e County, Virginia WILLIAM P. PORTER Box 1521 Wise, Virginia 24293 Opal is a hydrated amorphous...stalactitic (Milner, 1962, p. 154). Grayish multiform opaline outgrowths were observed on sandstone outcrops...ForĀ mation in Wise County, Virginia. Although Milner reports stalactitic forms of opal, no other reference...FORMATION SANDSTONES Figure 1: Arborescent form of opaline outgrowth. The Lee Formation is the basal member... p. 65). Sev- M AY/JUNE 1979 97 Figure 2: Opaline outĀ growths attached to porĀ ous sandstone. Figure |  | Cook, Kristen L., Martin, R., Rodgers, K. A., Campbell, K. A., Browne, P. R. L., Seakins, J. M. (2000) The Mineralogy, Texture and Significance of Silica Residue from the Te Kopia Geothermal Field, Taupo Volcanic Zone. | Other Paper | | California Institute of Technology,Pasadena, CA, USA Department, University of Institute, University of...strongly disordered and aluminium activity, this opaline silica can react with aluminous conditions, including...country rock. No silica phase intermediate between opal-A and quartz was conclusively identified at Te Kopia...but the presence of small amountsof poorly ordered opal-CT are suspected from skewed x-ray diffractiontraces...residue deposition the first-formed silica phase is opaline silica, and Herdianita et have stressed the importance |
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