 | | Report (issue) | | Bedrock Geologic Map of the Chester Quadrangle, Windsor County, Vermont By Nicholas M. Ratcliffe1 Open-File...endorsement by the U.S. Government. 'Reston, Va. 1995 Chester Quadrangle, VT DESCRIPTION OF MAP UNITS (major...Pegmatite (Devonian) Massive, nonfoliated, muscovite-biotite pegmatite, may be shown by symbol only Granite...(Devonian) Massive to weakly-foliated, muscovite-biotite-microcUne-plagioclasequartz granite to granodiorite...(cover sequence rocks) COVER SEQUENCE ROCKS OF THE CHESTER DOME Waits River Formation (Lower Devonian and |  | | Journal (article/letter/editorial) | | GRAND, ISLE: L Jirrwowwux/ lot* llMt UK* U'A VERMONT Mineral Locality Index VANDALL T. K I N G P.O....Massachusetts 01776 MASSACHUSETTS Figure J. Vermont political divisions map; adapted from U.S. Geological...of New Hampshire and Vermont (1972). 324 ROCKS & MINERALS he state of Vermont is relatively small,...quar ry in the world is in Rochester (Windsor Co.), Vermont. Min eral products mined "as is" for their...maintained. (The disuse of cobblestone roads prevents Vermont from being a giant mining state today, but in the |  | | Report (issue) | | GEOLOGIST ON THE MINERAL INDUSTRIES AND GEOLOGY OF VERMONT 1929-1930 SEVENTEENTH OF THIS SERIES GEORGE H...H. PERKINS State Geologist STAFF OF THE VERMONT GEOLOGICAL SURVEY 1929-1930 GEORGE H. PEinuNs, State...University of Vermont. ELBRIDGE C. JACOBS, Assistant CONTENTS Geologist, University of Vermont. CHARLES...PHYSIOGRAPHY OF VERMONT, G. H. PERKINS ..................... THE aEOLOGY OF VERMONT OCHER DEPOSITS,...107 MOUNT MONADNOCK III VERMONT, J. E. Worr ................... LIST OF VERMONT MINERALS, G. H. PERKINS |  | | Journal (article/letter/editorial) | | variation in muscovite of the Gassetts Schist and associated gneiss, Vermont Appalachians Willis E. Hames...24061, U.S.A. 1 Abstract An exposure near Gassetts, Vermont, contains lithologies varying from staurolite-kyanite... Hames et al.: 40Ar/39Ar Age of Muscovite in the Gassetts Schist A 385 Kyanite B Margarite Orthoclase...other phases: qtz = quartz; kfs = orthoclase; bi = biotite; gt = garnet; par = paragonite.) Figure 2 386...Hames et al.: 40Ar/39Ar Age of Muscovite in the Gassetts Schist and bulk compositions. Titanium substitution |  | | Journal (article/letter/editorial) | | isotope systematics of garnets from the Gassetts Schist, Vermont (see section 3 and Vance and Holland 1993)...petrology. Geothermometers such as the garnet-biotite equilibrium rely on the fact that at some time...D. VANCE 3. PROGRADE PROCESSES IN THE GASSETTS SCHIST, VERMONT The diffusion rates of Sm and Nd, and...Holland 1993). The following discussion of the Gassetts Schist will therefore rely equally on high-quality...good illustration of this link. The Gassetts Schist, Vermont, USA contains large garnets which preserve |  | | Journal (article/letter/editorial) | | concentrations in metamorphic garnet from southeastern Vermont, USA EDWARDD. YOUNG and DOUGLASRUMBLEIII Geophysical...Institution of Washington, Washington, DC 200 1%1305, USA (Received April 24, 1992; accepted in revisedform...and quartz from a sample of the Gassetts schist, southeastern Vermont, USA. Garnet and quartz 6180v.sMow...Proterozoic-Early Cambrian pelitic schist from southeastern Vermont. The sample examined is representative of a class...‘8O/‘6O values for marbles from southern Maine, USA, are consistent with both extensive fluid-rock interaction |  | | Journal (article/letter/editorial) | | Mineral Reactions in a Calc-Mica Schist from Gassetts, Vermont, U.S.A. Alan Bruce Thompson Department of...study of an interbedded calc-mica schist from Gassetts, Vermont reveals the complexities of Fe-Mg crystalline...of microcline + diopside + zoisite formed from biotite + calcite + quartz may be produced by continuous...diopside _+zoisite is commonly observed forming from biotite + calcite+quartz in carbonate rocks with mica or...M g substitution in dolomite, talc, amphibole, biotite and diopside, N a - C a - K substitution in feldspar |  | | Journal (article/letter/editorial) | | minerals analysed are magnetite, ilmenite, chlorite, biotite, garnet, kyanite, muscovite, feldspar and quartz...exchange with stwrounding trondjemite than muscovite, biotite and ihnenite. Regularities in isotopic fractionation...s / o 16 ratios of six schists f r o m Dutchess County, N e w York, to be g r e a t e r t h a n those...EeSTEIN (1962a,b) analyzed coexisting K-feldspar and biotite in four metasedimentary rocks in addition to plagioclase...schists from the Lincoln Mountain quadrangle, Vermont, undertaken by TAYLOR et at. (1963). The rocks |  | | Journal (article/letter/editorial) | | certain garnetiferous mica schist in south-central Vermont has beennamed Gassettsschist by C. H. Richardsonlfrom...Richardsonlfrom the excellent exposures near Gassetts station in Chester township. For the r Published by permission...Reading, Cavendish, Baltimore and Chester, Vermont: Report oJ the Vermont State Geotrogist,1927-28, p 225...garnet (almandite), kyanite, tourmaline, chlorite, biotite, magnetite, rutile, and zircon. The metamorphism... Tabular habit of staurolite in the schist at Gassetts. The muscovite is worthy of particular mention |  | | Journal (article/letter/editorial) | | in the assemblage staurolite-aluminium silicate-biotite-garnet-chlorite M. J . G I A R A M I T A * A N...CA 95616, USA ABSTRACT The assemblage muscovite-quartz-staurolite-aluminium silicate-biotite-garnet-chlorite...analysis of minerals from South Royalton and Gassetts, Vermont, USA, demonstrates that subsets of the minerals...of the minerals staurolite, aluminium silicate, biotite, garnet, chlorite, muscovite and quartz (SABGC... Smithsonian Institution, Washington, DC 20560, USA. for the presence of too many phases on the simplified |  | | Journal (article/letter/editorial) | | calcic pelitic schists from the Strafford Dome, Vermont, USA T. M E N A R D ' A N D F. S. SPEAR' 1 Department...Rensselaer Polytechnic Institute, Troy, NY 12180, USA ABSTRACT Metamorphism of the Gile Mountain Formation...Townshend-Brownington Syncline in east-central Vermont records two nappe-style events, D1 and D2, followed...followed by doming. D1 formed a muscovite + biotite f ilmenite schistosity subparallel to compositional...tectonic history of western New Hampshire and eastern Vermont include Spear & Rumble (1986), Kohn et al. (1992) |  | | Report (issue) | | INDUSTRIES OF VERMONT 1939-1940 REPORT OF THE STATE GEOLOGIST ON THE MINERAL INDUSTRIES OF VERMONT 1939-1940...Shop, Barre, Vt. RELIEF MAP OF VERMONT - FOREWORD STATE OF VERMONT OFFICE OF STATE GEOLOGIST BURLINGTON...Board of Conservation and Development, Montpeiier, Vermont, Gentlemen: I herewith present my biennial Report...deposits and to deveolp new mineral products in Vermont. Visits to many mineral localities have been made...Fleming Museum, University of Vermont. December, 1940. Fom many years Vermont stood first among the States |  | | Journal (article/letter/editorial) | | petrological study of a single garnet from the Gassetts Schist, Vermont Derek Vance and Tim Holland Department...in the Acadian metamorphic terrain of eastern Vermont have been analysed for major elements and segregated...metapelite from the Gassetts Schist which crops out on the west side of the Chester Dome, SE Vermont (Fig. 1),...lodged in the Harker Collection, Cambridge. The Chester Dome (and the smaller Athens Dome to the south)...sequence by Stanley and Ratcliffe (1985). The Gassetts Schist has been assigned to the Cavendish formation |  | | Journal (article/letter/editorial) | | locality in the State is Russell Gulch in Gilpen County. A small but very fine crystal group from Russell...mind. We have only one small rock outcrop in my county (Orange) at Rock Springs near Apopka. "The beaches...Camp Parole, just south of Annapolis, Anne Arundel County, Maryland. "The casts are thickly consolidated...minerals: Quartz, microcline, albite, muscovite and biotite, a few others were found such as pyrite, ilmenite...territory north of the Big Nose at Yosts in Montgomery County, N . Y. An easy way to reach it would be to turn |  | | Journal (article/letter/editorial) | | and State University, Blacksburg, VA 24061-0420, USA ABSTRACT The two major Early to Middle Palaeozoic...Planetary Sciences, M.I.T., Cambridge, MA 02139, USA. 415 416 T . R. A R M S T R O N G , R. J . T R...State, western Connecticut, Massachusetts and Vermont. As suggested by Stanley & Ratcliffe (1985), this...noted in the text: (1) Dutchess County, New York State; (2) Westchester County, New York State; (3) Waterbury...Nashoba Block and Avalonia; (6) Gassetts Schist locality and Chester Dome, Vermont; (7) Hatfield pluton and |  | | Journal (article/letter/editorial) | | Island, two muscovites+three paragonites from Gassetts, Vermont, and one muscovite from an adamellite in N...plus one single p a r a g o n i t e from Gassetts, Vermont. I n t h e c o n t e x t of questions considered...for samples from St. P a u l I s l a n d a n d Gassetts, V e r m o n t to see t h e effects of r a d i...(unpublished). 3 Mu = Muscovite; Qz = quartz; Bio = biotite; St = staurolite; Si = sillimanite; Gn = garnet;...l Island, muscovite a n d paragonite from Gassetts, Vermont, a n d muscovite from a n adamellite i n N |  | | Journal (article/letter/editorial) | | on paragonite-schists and -gneisses from Gassetts (Vermont, U.S.A.) and Vanzone (Italian Alps) and checked...requires the use of a monochromatic blue filter. Biotite is stained yellow but the staining might be irregular...irregular. Phlogopite should react in the same wav as biotite but this has not been tested. Frc. l-Stained thin...a garnet-muscovite-paragonite-schist from Gassetts, Vermont, photographed under blue light (Balzer interference...Professor de B6thune for his encouragement and for the Gassetts specimens and to Professor Lees for his critical |  | Millonig, Leo J., Albert, Richard, Gerdes, Axel, Avigad, Dov, Dietsch, Craig (2020) Exploring laser ablation U–Pb dating of regional metamorphic garnet – The Straits Schist, Connecticut, USA. Earth and Planetary Science Letters, 552. 116589pp. doi:10.1016/j.epsl.2020.116589 | Journal (article/letter/editorial) | | metamorphic garnet – The Straits Schist, Connecticut, USA Leo J. Millonig a,b,∗ , Richard Albert a,b , Axel...Cincinnati, P.O. Box 0013, Cincinnati, OH 45221-0013, USA b a r t i c l e i n f o Article history: Received...xenotime from The Straits Schist, western Connecticut, USA, to constrain the timing of garnet growth within...xenotime from The Straits Schist, western Connecticut, USA to evaluate if geologically meaningful ages can be...with low-grade fossiliferous meta-sediments in Vermont and southern Quebec (Hatch and Stanley, 1973) which |  | | Journal (article/letter/editorial) | | Broad Branch Road NW,, Washington, D.C. 20015-1305, USA Received August 21, 1992; revision accepted February...3 t=t o [ i t - t o + i0 Ma I I OARNET BIOTITE 6x80 contours=: 0.1 6180 c o n t o u r s - 61e0...the isotopic composition of garnet (left) and biotite (right). Surface 61so of both minerals was held...garnet and biotite are 11).9 and 10.3%o, respectively. Oxygen diffusivities for garnet and biotite are 8.49x...sphere (r = 0.25 cm) using eq. 6.18 of Crank [38]. Biotite was modeled as an infinite cylinder (axis parallel |  | | Journal (article/letter/editorial) | | metamorphism of pelitic rocks from Townshend Dam, VT, USA. This modeling builds on a published companion study...well-studied pelitic schists of Townshend Dam, VT, USA. Geological setting The spillway at Townshend Dam...later arched over the Athens dome (part of the Chester–Willoughby arch) during Devonian Acadian deformation... 1 a Simplified geologic map of southeastern Vermont. Star denotes sample location at Townshend Dam...Pressure–temperature conditions vary across southeastern Vermont, as the area is structurally complex. Estimated |  | | Journal (article/letter/editorial) | | this study: the northern Appalachians (Vermont, Maine, New York, USA); North American Cordillera (North Cascades...Cascades Range, Washington; Snake Range, Nevada, USA); western Rocky Mountains (British Columbia, Canada);...University of Minnesota, Minneapolis, MN 55455, USA e-mail: dwhitney@umn.edu are characterized by high-angle...confined to a garnet-bearing schist from SE Vermont, USA. 123 Contrib Mineral Petrol (2010) 160:591–607...Dutchess County, NY (Gt zone) Core: alm61sps25prp3grs11 Rim: alm77sps10prp6grs8 Dutchess County, NY (St |  | | Journal (article/letter/editorial) | | Georgia. The Cobb p:bbles have been found in Chicago, County specimen was collected by Bob Cook Co., III., on...away." Delphi is in the western part of Carroll County in the central part of the state. IOWA — A nice...is on a hillside on State highway 385, in Owen County, about 10 miles southeast of Gratz, Ky. LOUISIANA...from Mr. Gettings, other locality in Westchester County, if dated Feb. 27, 1952, reads: not in the whole...this item, dated Feb. 21, 1952: "Down in Millard County, Utah, south of Delta, and out in the middle of |  | EUGSTER, H. P., ALBEE, A. L., BENCE, A. E., THOMPSON, J. B., WALDBAUM, D. R. (1972) The Two-Phase Region and Excess Mixing Properties of Paragonite-Muscovite Crystalline Solutions. Journal of Petrology, 13 (1) 147-179 doi:10.1093/petrology/13.1.147 | Journal (article/letter/editorial) | | conventionally mounted mineral standards: Na—albite, Amelia County, Virginia; K—microcline, Asbestos, Quebec; Si—kyanite...a paragonite-muscovite schist near Mt. Grant, Vermont (Albec & Chodos, 1965) has a 9 per cent deficiency...a gravimetric analysis of paragonite from Gassetts, Vermont also indicates an alkali deficiency (Tables...5 Chemical analyses of micas from Gassetts and Mt. Grant, Vermont, U.S.A. / SiO, TiO, Al,Oa Fe,O, FeO...(4-70) 99-76 99-22 I Muscovite (Gassetts schist). II Paragonite (Gassetts schist). III Paragonite (II) corrected |  | | Report (issue) | | ..........................................106 Vermont .................................................Figures 1. Sketch cross-sections of typical "Vermont type" talc deposits, based on Waterbury and Barnes...Virginia, Maryland, Pennsylvania, Massachusetts, Vermont, and New York. Districts in California include...quarried for dimension stone. Talc deposits in Vermont are mostly located in a north-trending belt of...districts in Montana, Texas, Georgia, North Carolina, Vermont, and New York. Localities for which production |  | | Report (volume) | | changes in stratigraphic nomenclature in Oregon, Vermont, Massachusetts, and southern Pakistan U.S. GEOLOGICAL...stratigraphy of the Connecticut Valley trough, eastern Vermont, by Norman L. Hatch, Jr. S 3. Revisions to the...Massachusetts, and the southern Green Mountains, Vermont and Massachusetts, by Nicholas M. Ratcliffe 9 4...Foulweather and Euchre Mountain quadrangles, Lincoln County, Oregon: U.S. Geological Survey Miscellaneous Investigations...Stratigraphy of the Connecticut Valley Trough, Eastern Vermont By Norman L. Hatch, Jr. Abstract Proposed changes |
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