 | | Journal (article/letter/editorial) | | inch diameter crystal was found in the Pulsifer quarry at Auburn, Maine. Six inch crystals have been found...found at West Bethel, Maine, and at the Ruggles quarry, Grafton Center, New Hampshire. Notable excellently...Lode pegmatite near the Royal Gorge in Fremont County, Colorado. Common in the pegmatites of Yavapai...Mountain in the Crested Butte region of Gunnison County, Colorado, in good gem crystals. ANDRADITE, calcium-iron...Andradite has been found at Middletown, Delaware County, Pennsylvania and at other localities in Delaware |  | | Report (issue) | | ^ Anne Arundel County 43 Baltimore County 45 Howard County - Montgomery County 88 Prince Georges...Georges County Virginia 74 . 120 129 Arlington County 129 Fairfax County 131 Fauquier County 139...139 Loudoun County 143 Prince William County 149 Diabase quarries of northern Virginia 155 CAPTIONS...of the Baltimore Gabbro Complex at Ilchester, Maryland. Figure 6. Triassic diabase dike forming a ridge...Arundel, Prince George's/and Baltimore Counties, Maryland (Sterrett, 1911). Figure 9. Distribution of |  | | Report (chapter) | | crystalline basement (Howard et al. 1980; Miller et al. 1982; Hamilton 1982; Frost & Martin 1982a), can...of Utah and Nevada (Armstrong 1968; Burchfiel & Davis 1981). Thick zones of mylonitic gneiss that outcrop...thrusting ( J o h n 1982, 1986; Howard et al. 1982c; Shackelford 1980; Davis et al. 1982). In From COWARD...associated with Cretaceous plutonic rocks (Davis et al. 1980; Howard et al. 1980; Coney & Harms 1984). Mid-Tertiary...E-dipping, low-angle normal or detachment faults (Howard "& John, this volume). As a consequence of this |  | Duan, Wen-Yong, Li, Xu-Ping, Wang, Ze-Li, Chen, Shuang, Sun, Guang-Ming, Zhao, Ling-Quan (2021) Thermodynamic modeling and elemental migration for the early stage of rodingitization: An example from the Xialu massif of the Xigaze ophiolite, southern Tibet. Geoscience Frontiers, 12 (3) 101125pp. doi:10.1016/j.gsf.2020.12.006 | Journal (article/letter/editorial) | | amphibole (Act) + primary plagioclase (Plr) + clinozoisite + prehnite + albite + chlorite + titanite +...+ primary and late amphiboles (Ampr + Act) + clinozoisite + prehnite + albite + chlorite + titanite (R2...late clinopyroxene (Cpxn) and amphibole (Act) + clinozoisite + prehnite + albite + chlorite + titanite (R3...during rodingitization (Li et al., 2004a, 2007; Frost and Beard, 2007). The chemical composition of a...increasing P-T conditions from prehnite and clinozoisite rodingite (without Grt and Ves) via garnet–diopside |  | | Journal (issue) | | July 1943 PUBLISHED MONTH LY CHIPS FROM THE QUARRY .................................................2-Harry Ringwald LELAND£ QUICK PRACTICAL ARTS I- Howard McCornack 2-Ben M-aben CABOCHONS-LADIES ONLY I--Grace...Standridge 2-Belle Rugg 3-Melvin Gainder Novelties I- Howard ?\1cCornack 2-R. E. Willis 3-Ray Kruger Practical...White Horse Ranch to the Blitzen Valley, (Harney County, Oregon} and on the way I picked up some pieces...looked like slag from a furnace. This was in Grant County, Oregon, about 5 miles from Seneca. I was on a |  | Howard, K.A., Nielson, J.E., Wilshire, H.G., Nakata, J.K., Goodge, J.W., Reneau, Steven L., John, Barbara E., Hansen, V.L. (1990) Preliminary geologic map of the Mohave Mountains area Mohave County, western Arizona. Open-File Report Vol. 1990 (90-684) US Geological Survey doi:10.3133/ofr90684 | Report (issue) | | THE MOHAVE MOUNTAINS AREA MOHAVE COUNTY, WESTERN ARIZONA by K.A. Howard* 1 , I.E. Nielson* 1 , H.G. Wilshire*...as follows: Proterozoic and Mesozoic rocks~K.A. Howard; dikes J.K. Nakata; Miocene section I.E. Nielson;...reports on the crystalline rocks and structure (Howard and others, 1982a), dikes (Nakata, 1982), Tertiary...deposits (Wilshire and others, 1983), tectonics (Howard and John, 1987; Beratan and others, 1990), geophysics...and others, 1983); field guides (Nielson, 1986; Howard and others, 1987), and geochronology (Nakata and |  | | Journal (article/letter/editorial) | | Sciences, University of Michigan, Ann Arbor, MI 48109, USA Received 11 January 2000; received in revised form...been performed on metamorphosed iron formations. Frost ([3,13]) calculated equilibria in the system Fe^Si^C^O^H...subject to change once the solvus in the system clinozoisite^epidote is better documented and modeled thermodynamically...found in appreciable amounts in epidote and clinozoisite. Keskinen and Liou [25] determined the loci...from the Republic Node, MI, USA, a Barrovian calc^pelite from New England, USA, an eclogite from the eastern |  | | Report (issue) | | Chemehuevi Mountains area, San Bernardino County, California and Mohave County, Arizona by Barbara E. John* Open-File...Chemehuevi Mountains are between 17 and 22 Ma (Howard and John, 1987). FAULTING All rock types in the...assemblage of chlorite ± albite ± epidote ± clinozoisite ± sericite and rare calcite. The Chemehuevi...translation. From regional arguments put forward by Howard and John (1987), it can be inferred that the easternmost...Mountains, has a K-Ar sanidine age of 18.1 ± 0.6 Ma (Howard and others, 1982) TV Volcanic flows and intrusions |  | | Journal (article/letter/editorial) | | -Co-Zn-Ni Deposits of the SykesvilleDistrict, Maryland Piedmont P. A. CANDELA, A. G. WYLIE, AND T. M...smelter was pects(Fig. 1). It is locatedin Carroll County,Mary- built at the Patapscominesto producecopperand...quartzandplagioclase with subordinate ) / / hornblende,clinozoisite,chlorite,and mica.Significantquantitiesof a...FIG.2. Generalgeology of theeastern Piedmont of Maryland, modified afterMullerandChapin (1984).The Sykesville...ofhighhydrogenfugacities andhencelowfo• andj•2 (Eckstrand, 1975; Frost, 1985). The replacements,which occurredlatein the |  | | Journal (article/letter/editorial) | | Selverstone & Spear, 1985; Spear et aL, 1990b; Frost & Tracy, 1991). Previous studies on the metamorphism...(1944), White & Eric (1944), White & Jahns (1950), Howard (1969), Rolph (1982), Annis et al. (1983), and...these samples (Doll, 1943; White & Jahns, 1950; Howard, 1969; Rolph, 1982), and no metamorphic discontinuities...garnet + biotite + chlorite -I- plagioclase + clinozoisite + quartz + muscovite + H2O is modeled as an...predicts the reaction chlorite + muscovite + clinozoisite + quartz = garnet + biotite + plagioclase + |  | | Book (volume) | | Dahlonega Co. and Rabum Co., and the McDuffie County Belt extending through portions of McDuffie, Warren...Sphalerite. BALDWIN COUNTY MILLEDGEVILLE, at state farmjasper. BANKS COUNTY COMMERCE, along Hwy. 59...along adjoining Co. linerock crystal. BARROW COUNTY WINDER, along rd. to Jefferson and 1½ mi. inside...Guide for Rock Hounds in the United States BARTOW COUNTY AREA, Saltpeter Cave, as floatjasper. CARTERSVILLE:...(banded, various colors), jasper. BIBB COUNTY MACON: at Holton Quarry, 7½ mi. NWagate; N of Calloway |  | | Journal (article/letter/editorial) | | addition they contain: R1 – diopside, tremolite, clinozoisite, calcite; R2 – hydroandradite, diopside, epidote... 1996; Puschnig, 2002; Li et al., 2004a, 2007; Frost & Beard, 2007). Sea floor rodingites produced by...dissolution of clinopyroxene in mantle peridotite (Frost & Beard, 2007). This feasible desilication process...environment driven by serpentinization (Li et al., 2004a; Frost & Beard, 2007). Once formed at the sea floor, the...(Hgrs ⁄ Ves) mixture, chlorite, diopside and clinozoisite ⁄ epidote (abbreviations from Bucher & Frey |  | | Journal (article/letter/editorial) | | were calculated to a total of 11, and epidote/clinozoisite to 12.5 oxygens pfu. Mineral abbreviations in...pseudomorphs of plagioclase + white mica + epidote/ clinozoisite after magmatic plagioclase (e.g. Fig. 4b–d)... with accessory rutile and probably epidote/clinozoisite. A late-stage assemblage consists of brown-greenish...rutile and garnet (e.g. Fig. 4e) and epidote/clinozoisite-allanite as radial coronas surrounding magmatic...pfu and Ti = 0.10–0.12 pfu (Fig. 5f). Epidote/ clinozoisite (b3 vol%), in both plagioclase-rich pseudomorphs |  | | Journal (article/letter/editorial) | | the glass industry (Doud & Coffeen 1962), and a quarry for that purpose remains in operation to date....anorthosite is well-exposed in the currently active quarry, but natural exposures are limited and deeply weathered...anorthosite extends slightly to the west and south of the quarry, but in all such areas the rock is too deeply weathered...weathered to sample. Fresh rocks in the quarry vary in a somewhat irregular fashion from massive, coarsegrained...strongly foliated and lineated gneissic types at the quarry margins (Fig. 3B). Our sample set includes relatively |  | | Journal (article/letter/editorial) | | Beryl is quite common everywhere. "The Cheapside quarry, Deerfield, Mass., has given up some beautiful...inches overall, have been found. This is a trap rock quarry and almost anything can turn up with a blast. The...cut south of the Frost Bridge area). There was another good cut north of the Frost Bridge area, which...humontite ( W , R ) , zoisite, var. thulite ( R ) , clinozoisite ( R ) , apatite ( R ) , diopside ( R ) , wurtzite...used on a 1956 Mineral Club trip to St. Lawrence County. As you drive northeast from Antwerp along Route |  | | Report (issue) | | HART COUNTY, GEORGIA by Willard Huntington Grant ATLANTA 1958 ABSTRACT GEOLOGY OF HART COUNTY, GEORGIA...GEORGIA Hart County is in northeastern Georgia, where the Seneca and Tugaloo Rivers join to form Savannah...Geological Survey Bulletin No. 67, "The Geology of Hart County, Georgia," by Willard H. Grant. This investigation...presence of extensive deposits of sillimanite in Hart County which is an important undeveloped resource; also...investigation of these and other mineral resources of the county. The detailed geologic map accompanied by the text |  | Li, Xu-Ping, Duan, Wen-Yong, Zhao, Lin-Quan, Schertl, Hans-Peter, Kong, Fan-Mei, Shi, Tong-Qiang, Zhang, Xin (2017) Rodingites from the Xigaze ophiolite, southern Tibet – new insights into the processes of rodingitization. European Journal of Mineralogy, 29 (5) 821-837 doi:10.1127/ejm/2017/0029-2633 | Journal (article/letter/editorial) | | prehnite is absent, consists of the subgroups clinozoisite rodingite, garnet–diopside rodingite and garnet–vesuvianite...rocks (e.g., Coleman, 1963, 1977; O'Hanley, 1996; Frost & Beard 2007; Li et al., 2004a and b, 2007, 2008a...O'Hanley et al., 1992; Li et al., 2004a and b; Frost et al., 2008; Austrheim & Prestvik, 2008), or during...rodingite; it is replaced by garnet, chlorite, clinozoisite and diopside. The second generation of pyroxene...470 471 472 473 474 475 476 477 478 These are clinozoisite and epidote. They represent early rodingitization |  | Mubarak, Heba S., Azer, Mokhles K., Surour, Adel A., Moussa, Hilmy E., Asimow, Paul D., Kabesh, Mona M.L. (2020) Mineralogical and geochemical study of rodingites and associated serpentinized peridotite, Eastern Desert of Egypt, Arabian-Nubian Shield. Lithos, 374. 105720pp. doi:10.1016/j.lithos.2020.105720 | Journal (article/letter/editorial) | | California Institute of Technology, Pasadena CA 91125, USA ro of 1 -p Abstract We studied rodingite and...prehnite, ferropargasite, albite, andesine, clinozoisite and diaspore. Some rodingitelike rock samples...serpentinization of ultramafic rocks (e.g., Coleman, 1977; Frost and Beard 2007; Bach and Klein, 2009; Li et al....Sciences (GPS), California Institute of Technology, USA. Surfaces were vacuum-coated with ~15 nm of carbon...at California Institute of Technology (Caltech, USA) and Activation Laboratories Ltd. (Actlabs, Canada) |  | | Journal (article/letter/editorial) | | mClange, northern California Klamath Mountains, USA M. M. DONATO U.S. Geological Survey, 345 Middlefield...Middlefield Road, MS 910, Menlo Park, California, USA ABSTRACT Mineral assemblages in pelitic, mafic, calcareous...locality, clinopyroxene occurs with grossularite, clinozoisite, blue-green amphibole, plagioclase, calcite...actinolitic rims, abundant titanite and retrograde clinozoisite that replaces plagioclase. The presence of brown...in the WHt lack epidote. Chlorite and epidote/clinozoisite are common in amphibolitefacies and transitional |  | | Journal (article/letter/editorial) | | containing calcite + quartz dolomite zoisite clinozoisite margarite paragonite chlorite. These veins...Lake Cataclastic Zone. Equilibria involving clinozoisite + margarite + quartz calcite plagioclase...& M University, College Station, TX 77843-3115, USA J. Morrison Department of Earth Sciences, University...Southern California, Los Angeles, CA 90089-0740, USA Editorial responsibility: T. L. Grove At 400 to...directly, or as components of a silicate melt (Frost et al. 1989). However, even peak metamorphic ¯uids |  | | Journal (article/letter/editorial) | | Melt inclusions in alluvial sapphires from Montana, USA: Formation of sapphires as a restitic component of...Melt inclusions in alluvial sapphires from Montana, USA: Formation of sapphires as a restitic component of...Melt inclusions in alluvial sapphires from Montana, USA: PT Formation of sapphires as a restitic component...America, 5355 Armada Drive, Carlsbad, CA 92008, USA 2 Montana Bureau of Mines and Geology, Montana...Montana Tech, 1300 West Park Street, Butte, MT 59701, USA MA *aaron.palke@qm.qld.gov.au †Present address: |  | | Journal (article/letter/editorial) | | New York 6530 Kissena Blvd., Flushing, NY 11367, USA Eric D. Kelly Department of Geological Sciences,...Texas 2275 Speedway Stop C9000, Austin, TX 787, USA Corresponding author mail id:- jhmarsh00@gmail.com...surrounding garnet cores containing quartz and clinozoisite inclusions, indicate the presence of evolving...investigating igneous and metamorphic processes (see Frost et al., 2000 and Meinhold, 2010 for reviews). These...determining which of the Ti-rich minerals is stable. Frost et al. (2000) identified the bulk Ca/Al ratio as |  | | Report (issue) | | and moved as liquids (Fountain and others, 1981; Frost and Lindsley, 1981; .Grant, 1983) QUARTZ VEIN Quartz...825* to 1,100* C and pressures of 1.5 to 2 kbar (Frost and Lindsley, 1981; Fuhrman and Lindsley, 1983)...Richeau Hills (RH), at and near the Wheatland Marble Quarry (Hightower SW 7 1/2' quad.), on Squaw Mountain...dolomite, well represented at the Wheatland Marble Quarry (Hightower SW 7 1/2' quad.), one mile west of the...during the late 1970's and early 1980's), in a quarry adjacent to eastern McMurray Creek (SR)(subtle |  | | Journal (article/letter/editorial) | | golyshevite occurs in the northern face of the Mica quarry in pegmatite no. 10 of the Kovdor massif, Kola...Þne-grained ijolite of the northern face of the iron-ore quarry at the 115 m horizon of the Kovdor massif, Kola...mogovidite also occurs in the dumps at the Mica quarry, pegmatite no. 10 of the Kovdor massif, in samples...P21/m. Zoisite is an orthorhombic polymorph of clinozoisite and is thus not considered a member of the epidote-group...recognized: 1. Clinozoisite subgroup: members are derived from the mineral clinozoisite Ca2Al3[Si2O7][SiO4]O(OH) |  | | Journal (article/letter/editorial) | | with accessory plagioclase, microcline, epidote/clinozoisite, chlorite and hematite (Fig. 3). Generally,...contain also wollastonite, vesuvianite and/or clinozoisite. Between the Victoria Bay and the Kaaimansrivermouth...of well-orientated actinolite, albite rich in clinozoisite inclusions, chlorite, biotite, quartz, and titanite...contact with grossular-rich garnet, clinopyroxene, clinozoisite, quartz and calcite in sample VB37. Matrix vesuvianite...grains in contact with clinopyroxene, calcite or clinozoisite, and quartz, or with wollastonite, _+clinopyroxene |
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