 | | 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...dikes 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...(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,...quarĀ ry in the world is in Rochester (Windsor Co.), Vermont. MinĀ 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 |  | | Journal (article/letter/editorial) | | 40Ar/39Ar age variation in muscovite of the Gassetts Schist and associated gneiss, Vermont Appalachians Willis...24061, U.S.A. 1 Abstract An exposure near Gassetts, Vermont, contains lithologies varying from staurolite-kyanite...schists with paragonitic muscovite to potassic gneiss with phengitic muscovite. Singlecrystal laser fusion...40Ar/39Ar ages for paragonitic and phengitic muscovite yield similar distributions with ranges between...superimposed on early generation muscovite. Thus, the mean age of muscovite in these samples (typical of |  | | 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) | | 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...staurolite, muscovite, chlorite, and quartz from a sample of the Gassetts schist, southeastern Vermont, USA...centers to 13.8 +- 0.1 at margins. Staurolite, muscovite, and chlorite have mean 6āO values of 10.8, 11...textures. One consists of garnet cores, staurolite, muscovite, and quartz included in garnet. Garnet rims, chlorite |  | | Journal (article/letter/editorial) | | isotope systematics of garnets from the Gassetts Schist, Vermont (see section 3 and Vance and Holland 1993)...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...(Christensen et al. 1989; Vance and Holland 1993). The Gassetts Schist occurs within a Precambrian rift sequence |  | | 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...interbedded carbonate-pelite sequence near Gassetts, Vermont was made in an attempt to elucidate some of...near the Williams River about 3 km north of Gassetts on Vermont Route 103. The calc-mica schist is adjacent...Tyson Formation, mantling the western part of the Chester gneiss dome (see Doll et al., 1961; Sheppard and |  | | Journal (article/letter/editorial) | | ilmenite, chlorite, biotite, garnet, kyanite, muscovite, feldspar and quartz. The only anomalous sequence...isotopic exchange with stwrounding trondjemite than muscovite, biotite and ihnenite. Regularities in isotopic...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...schists from the Lincoln Mountain quadrangle, Vermont, undertaken by TAYLOR et at. (1963). The rocks...chemical types. The isotopic compositions of quartz, muscovite, chlorite and ilmenite were found to remain constant |  | | Journal (article/letter/editorial) | | of California, Davis, CA 95616, USA ABSTRACT The assemblage muscovite-quartz-staurolite-aluminium si...analysis of minerals from South Royalton and Gassetts, Vermont, USA, demonstrates that subsets of the minerals...aluminium silicate, biotite, garnet, chlorite, muscovite and quartz (SABGC assemblages) contain five phases... Smithsonian Institution, Washington, DC 20560, USA. for the presence of too many phases on the simplified...and written communication Worcester Mountain, Vermont Rangeley Quadrangle, Maine Snow Lake area, Manitoba |  | | Journal (article/letter/editorial) | | MINERALĆGICA!. SOCIETY'S 4-DAY COLLECTING TRIP TO VERMONT AND NEW HAMPSHIRE By W . Downloaded by [University...correspondence and exchange of minerals with a collector in Vermont. As the exchanges showed that worthwhile mineral...suggestion was made to our members and also to the Vermont correspondent that a Society trip be made to northern...correspondent, Russell H. Leitch, of Springfield, Vermont, wrote that he would be pleased to guide us to...we were escorted to Vail's Motor Court, west of Chester, Vt., where we took over all the units of the Court |  | | 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...Tabular habit of staurolite in the schist at Gassetts. The muscovite is worthy of particular mention because...and zircon are entirely microscopic and rare. At Gassetts a mill has been constructed for the crushing 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) | | Region and Excess Mixing Properties of Paragonite-Muscovite Crystalline Solutions by H. P. EUGSTER, A. L....chemical compositions of synthetic paragonite-muscovite pairs were obtained by electron probe microanalysis...thermodynamic mixing properties of paragonite-muscovite crystalline solutions, based on the two-phase...properties should be applied with caution to natural muscovite- and paragonite-bearing assemblages. INTRODUCTION...system NaAlSi3O8-KAlSi3O8-Al2O3-H2O, in which muscovite, paragonite, and their decomposition products |  | | Journal (article/letter/editorial) | | Springer-Verlag 1973 Compositional Variation of Muscovite as a Function of Metamorphic Grade and Assemblage...for two muscovite from St. Paul Island, two muscovites+three paragonites from Gassetts, Vermont, and one...one muscovite from an adamellite in N.W. Maine. These data given further information on the effects of...of P, T, and bulk composition on muscovite composition. Specifically, temperature clearly influences the...the Na/Na-1-K ratio of muscovite in limiting assemblages but may not have much effect on the phengite |  | | 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...east-central Vermont records two nappe-style events, D1 and D2, followed by doming. D1 formed a muscovite + biotite...the assemblage albite epidote + K-feldspar + muscovite + chlorite, with grade increasing east toward...tectonic history of western New Hampshire and eastern Vermont include Spear & Rumble (1986), Kohn et al. (1992) |  | | 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) | | metamorphic rocks of the Saxtons River areax in southern Vermont, certain facts aroused curiosity concerning the...equivalent to the schist containing kyanite at Gassetts, Vermont (Thompson, 1950; Currier, 1934,p. 335-339)...higher grade assemblage,kyanite-quartz, found at Gassetts. Accordingly a specimen of schist was collected...optic angle more nearly characteristic of common muscovite (2V:40"). The schist was crushed, and the fraction..."GeologyoJ the southernpart oJ the Chesterd.ome,Vermont,,,submitted in May, 1954,to the faculty of Harvard |  | | 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) | | 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) | | AesrRAcl Sodium cobaltinitrite can tre used to stain muscovite, to distinguish it from paragonite. The stain...paragonite from accompanying muscovite (either pure, or phengitic muscovite). The following procedure,...on paragonite-schists and -gneisses from Gassetts (Vermont, U.S.A.) and Vanzone (Italian Alps) and checked...process whereas paragonite remains unstained. Muscovite Iamellae arranged with the cleavagetruncating...thin section of a garnet-muscovite-paragonite-schist from Gassetts, Vermont, photographed under blue |  | | Journal (article/letter/editorial) | | Williams College, Williamstown, Massachusetts 01267, USA Abstract. During prograde metamorphism garnet and...in a chlorite-chloritoid schist from Jamaica, Vermont. These rocks also provide an excellent opportunity...Tyson Formation Tyson Formation -CZts- Quartz-muscovite schist CZtqm - Quartzite-dolomite unit C Z t...east of the Green Mountain massif in southern Vermont (Rosenfeld 1968; Thompson and Norton 1968; Naylor...Formation near the Athens dome in southeastern Vermont, 6 km east of the Jamaica area. He suggested that |  | | 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...MaineāGreen tourmaline, black tourmaline xls, beryl, muscovite. "Harvard Quarry, Noyes Mt., Greenwood, MaineāGarnets...Pits, Greenwood, Maineā Green tourmaline, beryl, muscovite, montmorillonite. "Mt. Newry, Newry, Maine ā Black...Camp Parole, just south of Annapolis, Anne Arundel County, Maryland. "The casts are thickly consolidated |  | | 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) 160:591ā607...Dutchess County, NY (Gt zone) Core: alm61sps25prp3grs11 Rim: alm77sps10prp6grs8 Dutchess County, NY (St |  | | 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 ChesterāWilloughby arch) during Devonian Acadian deformation... 1āāa Simplified geologic map of southeastern Vermont. Star denotes sample location at Townshend Dam...Pressureātemperature conditions vary across southeastern Vermont, as the area is structurally complex. Estimated |  | Millonig, Leo J., Albert, Richard, Gerdes, Axel, Avigad, Dov, Dietsch, Craig (2020) Exploring laser ablation UāPb dating of regional metamorphic garnet ā 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 ā The Straits Schist, Connecticut, USA Leo J. Millonig a,b,ā , 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 |  | | Report (issue) | | THE INTERIOR GEOLOGICAL SURVEY GEOLOGY OF THE WINDSOR QUADRANGELE, MASSACHUSETTS Stephen Alien Norton...Granulite Member Garnet Schist Member Quartz-muscovite-calcite Schist Member Greenschist Thickness Age...Age Rowe Schist General Statement Muscovite-chlorite Schist Carbonaceous Phyllite and Black Quartzite...Gneiss, and Quartzite Massive Quartzite Member Muscovite-quartz Schist Thickness Age Cheshire Quartzite...131 General Statement Garnet Biotite Chlorite Muscovite and Paragonite Albite 131 132 l*tl I*t8 1^8 171 |
|
