 | | Report (issue) | | University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Conservation and Survey...Gemstones of Nebraska: A Handbook for Students and Collectors Roger K. Pabian University of Nebraska - Lincoln...Lincoln, rpabian1@unl.edu Allan Cook University of Nebraska - Lincoln Follow this and additional works at:...K. and Cook, Allan, "Minerals and Gemstones of Nebraska: A Handbook for Students and Collectors" (1976)...Resources, School of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion |  | | Report (chapter) | | 61801, USA 2Illinois State Geological Survey, 615 E Peabody Drive, Champaign, Illinois 61820, USA 3Department...Young University, P.O. Box 24606, Provo, Utah 84602, USA Abstract: The continental interior platform of the...Andrews on May 30, 2015 STRIKE-SLIP FAULTING IN THE USA CRATON interior platform of North America includes...finally for the Holocene. We Fig. 1. (a) Map of the USA continental interior, illustrating the distribution...Williston basin; OA = Oklahoma aulacogen; NU = Nemaha uplift; MCR = Midcontinent rift; OD = Ozark dome; |  | | Journal (article/letter/editorial) | | F I E L D I N V E S T I G A T I O N S in Pierce County, western Wisconsin, have led to the discovery of...Ordovician dolostone quarry. Associated minerals are calcite, goethite, pseudomorphs after pyrite, dolomite...mm long. Associated minerals are dolomite and calcite. 124 ROCKS & MINERALS proximately 50 miles southeast...State Highway 35 (the Great River Road) and Pierce County Highway S intersect in the center of Maiden Rock...in the past. The quarry is leased to the Pierce County Highway De partment and at present is not posted |  | Hu, Yazhou, Holmer, Lars E., Liang, Yue, Duan, Xiaolin, Zhang, Zhifei (2021) First Report of Small Shelly Fossils from the Cambrian Miaolingian Limestones (Zhangxia and Hsuzhuang Formations) in Yiyang County, Henan Province of North China. Minerals, 11 (10) 1104 doi:10.3390/min11101104 | Journal (article/letter/editorial) | | Limestones (Zhangxia and Hsuzhuang Formations) in Yiyang County, Henan Province of North China Yazhou Hu 1 , Lars...Limestones (Zhangxia and Hsuzhuang Formations) in Yiyang County, Henan Province of North China. Minerals 2021,...Miaolingian, from the Longwanggou Section, Yiyang County, Henan Province of Central China, ca. 180 km southeast...Henan Province, and the Cambrian outcrops in Yiyang County, the location of the Longwanggou section studied... (B) Sketch map of the Henan indicating Yiyang County, showinglocalities the location the(yellow Longwanggou |  | | Journal (article/letter/editorial) | | Appalachian,Michigan,Illinois, Salina (Kansas and Nebraska), and Anadarko (northern Oklahoma,Texas, and southernKansas)...Little Rock and Hot Springs area of rugs, veinlets, calcite concretions,and as replacecentral Arkansas, where...sandstone bedsthat are sociated with abundant calcite. Such minor occurparticularlywidespread in the...occurrences. Acknowledgments Theassistance of M. R. Brock,P. W. Guild,J. L. Jolly, R. D. Trace, F. G. Snyder...inclusions are concentrated brines of similar County,Illinois: Ecmv. G•.or..,v. 49, p. 891-902. Bucher |  | Brand, Uwe, Jiang, Ganqing, Azmy, Karem, Bishop, James, Montañez, Isabel P. (2012) Diagenetic evaluation of a Pennsylvanian carbonate succession (Bird Spring Formation, Arrow Canyon, Nevada, U.S.A.) — 1: Brachiopod and whole rock comparison. Chemical Geology, 308. 26-39 doi:10.1016/j.chemgeo.2012.03.017 | Journal (article/letter/editorial) | | P. Montañez e a Department of Earth Sciences, Brock University, St. Catharines, Ontario, Canada L2S...University of Nevada Las Vegas, Las Vegas, NV 89154-4010, USA c Department of Earth Sciences, Memorial University...TX 77002, USA e Department of Geology, University of California-Davis, Davis, CA 95616, USA b a r t i...with isotope values of coeval brachiopod low-Mg calcite (LMC). More importantly, a detailed investigation...brachiopods and whole rock (if originally low-Mg calcite) is achieved in 22% of coeval samples for Δ13CbLMC-WR |  | | Book (volume) | | Idaho, lowa, Kansas, Minnesota, Missouri, Montana, Nebraska, North Dakota, — ; Oregon, South Dakota, Washington...Idaho, Iowa, Kansas, Minnesota, Missouri, Montana, Nebraska, North Dakota, Oregon, South Dakota, Washington...Idaho, Iowa, Kansas, Minnesota, Missouri, Montana, Nebraska, North Dakota, Oregon, South Dakota, Washington...Idaho lowa Kansas Minnesota Missouri Montana Nebraska North Dakota Oregon South Dakota Washington ...volumes, through very precise directions and accurate county maps, to get you to the best and most accessible |  | | Journal (article/letter/editorial) | | [University of Calgary] at 03:39 02 February 2015 Calcite, one of Nature's most common minerals, has the...Virginia 24601 NOT LONG AGO, I was admiring a calcite specimen from Virginia, coveting it for our collection...relatively high price" ... but, it's only a calcite." "Only a calcite!", 1 thought, with some indignation. From...Roberts at the Detroit Mineral Show in 1981), calcite had captured my imagination. While it is true that..."Only a calcite"-indeed! Did that person really understand the complexity, geologic Figure J. Calcite, Meshberger |  | | Report (volume) | | Forination ___ -----------------------------------------Brock Canyon Forination_______________________________________..._ ___ ___ ________ __ __ _____________________ Brock Canyon Forination in the Dry Hills____________________...2-4. Photomicrographs: 2. Arkosic wacke of the Brock Canyon Formation__________ 11 3. Typical volcanic...breccia__________________ 12. Contact of the Brock Canyon Formation and the Brock Canyon pluton------------------...recrystallized and kaolinized arkose (?) of the Brock Canyon Formation from a screen in Doc Creek___ 14 |  | | Journal (issue) | | pegmatitic and pegmatoid rocks, calcite-amphibole-pyroxene and calcite-perovskitemagnetite-pyroxene rocks...Photo: 5.1.Pekov. The Baringer Hill Pegmatite Llano County, Texas Art Smith artsmithite@msn.com Introduction...(typically magnesiohastingsitc) and enriched by calcite and magnetite. Subordinate rock-forming constituents...semi-metallic Juster. Clusters associated with calcite, magnetite, titanite, diopside and magnesiohastingsite...extraordinarily rich. Crystals of CERITE-(Ce) on calcite. Afrlkanda. I.V. Pekov collection. Photo: I.V. |  | Heyl, A. V., Delevaux, M. H., Zartman, R. E., Brock, M. R. (1966) Isotopic study of galenas from the upper Mississippi Valley, the Illinois-Kentucky, and some Appalachian Valley mineral districts. Economic Geology, 61 (5) 933-961 doi:10.2113/gsecongeo.61.5.933 | Journal (article/letter/editorial) | | M. H. DELEVAUX, • R. E. ZARTMAN, AND M. R. BROCK CONTENTS PAGE Abstract .........................GeologicalSurvey. 933 934 HEYL, DELEVAUX,ZARTMAN,AND BROCK to bethemajorsourceof theleadin the deposits of...INTERIOR REGION AND NEARBY COASTAL PLAIN (From Brock and Heyl, 1961) I •3-/7 ALKALI GROUp SUBALKALI...particular,the 936 HEYL, DELEVAUX, ZARTMAN, AND BROCK commercially importantSoutheastMissouri(Fig. 1...operationis 938 HEYL, DELEVAUX, ZARTMAN, AND BROCK carried outin a 15-mlcentrifuge tubeimmersed in |  | | Report (volume) | | Bulletin, nos. 23-25. Hartford, Conn. Delaware County Institute of Science: Proceedings, vol. 7, no....nos. 9-12; vol. 29, nos. 1-8. Philadelphia, Pa. Nebraska Academy of Sciences: Publications, vol. 8, nos...nos. 1-3; vol. 9, nos. 1, 2. Lincoln, Nebr. Nebraska Geological Survey: vol. 4, pts. 1, 2, 4-10, 12-24;...Chicago, 111. West Virginia Geological Survey: County Reports, Logan and Mingo; Boone; Wyoming and McDowell...14. Ancient auriferous gravel channels of Sierra County, California: Am. Inst. Min. Eng., Trans., vol. |  | | Journal (article/letter/editorial) | | CO. QUARRY PLEASANT RIDGE, INDIANA KENNETH J . BROCK Department of Geosciences Indiana University Northwest...weekend treks to a remote dolostone quarry in Jasper County, Indiana. Specimens from this site, known as the...to entirely obscure the underly ing materials. Calcite and dolomite crystals are frequently present, and...Figure 1: Pyrite encrustation pseudomorph after calcite; 4 cm high. H . Precht specimen; T . Huizing photo...within calcite suggest its presence dur ing crystallization. It is also apparent that some calcite de |  | | Journal (article/letter/editorial) | | mineral and is commonlyaccompaniedby microcline. Calcite is commonin someareas. Other gangue minerals that...amount shown; N.D.--no Thorium veins District or County area State Dipof data] Samples analyzedRocks...02 -12.5 Yes Yes Christman and others (1959); Brock and Singewald (1968). Mountains and Fremont ...Individualveinsare commonlyvariablein thickness. (Singewald and Brock, 1956, p. 584), Mountain For example in the Lemhi...quartz-feldspar-iron oxide- and in the Wet Mountains(Brock and Singewald, thoriumdepositsare tabular,someof |  | | Journal (article/letter/editorial) | | Gibson mine, Bertrandite, New Hampshire, 161 Pitkin County, Colorado; specimen Beryl, South Dakota, 383 Biology-Earth...Russell, 396-99 mine, Magdalena district, Socorro County, New Mexico; Ron Gibbs specimen and Biotite: New...Bismuth, South Dakota, 383 tite, Thomas Range, Juab County, Utah; Bolt, E., see Spotlight on Juniors Martin...Wyoming, 172-75 Abstracts, see Eighteenth Rochester Brock, K. J., see Eighteenth Rochester Mineralogical ...South Dakota, 383 Almandine, South Dakota, 383 Calcite: drawings, 111; Kentucky, 39; New Anatase, New |  | | Report (volume) | | vol. 12, pp. 223-240. Davenport, Iowa. Delaware County Institute of Science: Proceedings, vol. 5, nos...Washington, D. C. West Virginia Geological Survey: County Reports, Pleasants, Wood, and Ritchie Counties;...444, p. 13. Two areas of oil prospecting in Lyon County, western Nevada. U. S. Geol. Survey, Bull. 381...figs., 1910. Arey, Melvin F. 30. Geology of Butler County. Iowa Geol. Survey, vol. 20, pp. 1-59, 2 pis.,...figs., 1 geol. map, 1910. 31. Geology of Grundy County. Iowa Geol. Survey, vol. 20, pp. 61-95, 3 pis. |  | | Report (chapter) | | Aztec Sandstone in the Buffington window, SE Nevada, USA LUISA F. ZULUAGA1,2, HAAKON FOSSEN1,3,4*, GREGORY...Bottom left: location of the study area in Clark county, SE Nevada, with major thrust and strike-slip tectonic...thrust sheet of .2 km (Willemin 1984) or 4–5 km (Brock & Engelder 1977) thickness that moved at least 40...increases towards the thrust, as demonstrated by Brock & Engelder (1977) based on three traverses into... ZULUAGA ET AL. State Park, in Clark County of SE Nevada, USA (Fig. 1). The window is a c. 28 km2 exposure |  | | Journal (article/letter/editorial) | | Copyright © 2001 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/01 $20.00 ⫹ .00 Pergamon...of sedimentary carbon in eutrophic Lake Mendota (USA): New models for interpreting isotopic excursions...Northwestern University, Evanston, Illinois 60208 USA (Received March 4, 1999; accepted in revised form...carbon phases in eutrophic Lake Mendota (Wisconsin, USA) indicates that the ␦13C composition of sedimentary...incorporated into CaCO3 during biogenically induced calcite precipitation. A comparative study between eutrophic |  | | Journal (article/letter/editorial) | | THE FOUR TWIN LAWS OF CALCITE a n d H o w To R e c o g n i z e T h e m Downloaded by [Texas A & M International...alcite collectors often ask, "How many kinds of calcite twins are there?" The answer is hard to give because...is rephrased: "How many twin laws are there for calcite?" In this case, the answer is I will go further...that there are four, and only four, twin laws for calcite. The rest of this article will be spent explaining...observant collector should be able to tell whether a calcite crystal is twinned or not and to determine which |  | | Journal (article/letter/editorial) | | Mississippi Valley districtare beingstudiedby Heyl and Brock in a joint studywith us. As the mineralogyand paragenetic...Gangue minerals include aragonite, barite, bitumen, calcite, gypsum, marcasite, pyrite, quartz, and chalcedonv...periodsof depositionof the yellow fluoriteand calcite. Five stagesof fluorite, distinguishedby 4 colors...establishedonly as younger than milky rhombohedral calcite. Large crystalsof purple fluorite were collectedfrom...Yellow fluorite •Vhite fluorite Blue fluorite calcite Early purple fluorite Chalcopyrite Quartz Sphalerite |  | | Report (issue) | | Arkansas River on the north, the CusterHuerfano County line on the south, the Texas CreekWestcliffe fault...of area in plate 1 (patterned area). Numerous county roads connect the defunct mining communities of...1954; Singewald and others, 1955; Singewald and Brock, 1956; and Christman and others, 1959). Parker and...especially in the Mount Tyndall 7 Vz -minute quadrangle (Brock and Singewald, 1968), the Cotopaxi and Royal Gorge...reported in Staatz and others bearing gneisses. Brock and Singewald (1968) have fur (1979) and in Staatz |  | | Journal (article/letter/editorial) | | Illinois-Kentucky Alto Pass, Ill. Clay Diggings, Pope County, Ill. Deardorff mine, Ill., Deardorff mine, Ill...Ill., Lone Oak, Mercer County, KY. early colorless Lone Oak, Mercer County, KY. late purple Upper...Upper Mississippi Volga, Clayton County, Iowa colorless (written cc•m.mication, c. w.. Brow,, 1•65) nd...Renault Limestone from the Oxford mine shaft south calcite, quartz, pyrite, and traces of sphaleriteand into...Thompson-Temperlymine was selectedfor dolomite,calcite,and barite. A detaileddescription detailed studies |  | | Journal (article/letter/editorial) | | mine, Arizona; photo by Jeffrey Scovil May-June: Calcite, Meshberger Stone, Inc., Columbus, Indiana; photo...gold on quartz, Colorado Quartz mine, Mariposa County, California. © Harold and Erica Van Pelt photographers...Montpelier, Hanover County, Virginia, 57 Bowenite, 251, 266, 288 Britholite, 193 Brock, K . J . , Minerals...Minerals of Poker Hill, Cum berland, Providence County, Rhode Island, 281 Cain, J . A . , The Geology...Geology of Rhode Island, 257 Calcioancylite, 192 Calcite, 33, 68, 114, 220, 287, 347 Caledonite, 56 California |  | | Journal (article/letter/editorial) | | specimen of calcite. John D. Atkins, Jr. 502 Bellview Ave., Falls Church, Va. Western Nebraska Minerar Society...July 8th, 1951, to French Creek Mines, in Chester County, Penn. When sixty-one rockhounds pounded the old...yielded specimens of natrolite and other minerals. A calcite with a yellow fluorescence has been found here...from Windham, Vt., pyrite from Perkinsville,Vt; Calcite from Weston, Ohio., and a specimen of blue-green...and the ruby and rhodolite garnet area in Macon county, N. C , illustrated by fine cut specimens of his |  | | Journal (article/letter/editorial) | | involve someform of igneousactivity to producethe Brock, 1961; Trace, 1973) also indicatesthat the archingof...studiesof homogenAn aeromagnetic surveyof Hardin County (Mc- izationtemperatures of the fluid in crystalinclusions...the silica was taken into A secondarea in Hardin County is the Central solutionby the ore solutionsand...author obage (Trace, 1960; Trace, 1973; Heyl and Brock, served zoning of barite in central Kentucky at...synclineand low occurrences,and sphaleritewith calcite at depth. the faulting of the fluorspararea in |
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