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| New Hampshire Mineral Locality Index Downloaded by [University of Newcastle, Australia] at 15:01 05...Grafton County. Rob Lawrence photo, courtesy Bob Whitmore. 242 ROCKS & MINERALS lthough New Hampshire...reading Jackson (1844) on the mineralogy of New Hampshire that even at this early date there was already...activity produced new localities, renewed some old localities, and resulted in new minerals being discovered...LOCATIONS BY COUNTY Belknap County Alton area: arsenopyrite, galena, quartz (crystals), sillimanite (Avery |
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| Geoloqy of the Nashua River Area, Massachusetts - New Hampshire By Gilpin Rile Robinson, Jr. Open-Fi1e Report...sandstone and micaceous quartzite member (wcs) 25 MERRIMACK FORMATION 26 Nomenclature, Historical Background...andalusite schists 82 Staurolite-Kyanite Zone 83 Sillimanite Zone 84 CALCAREOUS SILTSTONES AND QUARTZOFELDSPATHIC...Staurolite-Kyanite/Andalusite (Actinolite) Zone 97 Sillimanite Zone 100 VI Page REGIONAL ESTIMATES OF PRESSURE...OF DEPOSITION 108 Worcester Formation 108 Merrimack and Oakdale Formations 111 Unit as_ 112 PALEOCURRENT |
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| in central Massachusetts and south-western New Hampshire: evidence for contrasting P - - T trajectories...Silurian-Lower Devonian marine sedimentary trough, the Merrimack trough, that closed at the beginning of the collisional...(1) and carried high-temperature rocks from the Merrimack synclinorium in the east over cooler rocks of...- S r ages from four representatives of the New Hampshire Plutonic Series (Lyons & Livingston 1979) indicate...Garnet-Cordierite-Sillimanite-K-feldspar "~" Sillimanite--K-feldspar I~ Sillimanite-M uscovite--K-feldspar |
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| Massachusetts: An Enigmatic Terrane G. Stratigraphy of the Merrimack Belt, Central Massachusetts H. Structural and...By RICHARD GOLDSMITH G. Stratigraphy of the Merrimack Belt, Central Massachusetts By PETER ROBINSON...All who were involved in the preparation of the new bedrock map, particularly those responsible for the...understanding and portrayal of the geology. Although the new map is very different from Emerson's in many aspects...part of the State are the Connecticut Valley and Merrimack "belts" of primarily Silurian and Devonian strata |
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| showing major structural features in southeastern New England.. 3. Photomicrographs showing mylonitic fabrics...zone extending more than 200 km across southeastern New England, their recognition is obscured by an extensive...geologic evidence along a 15km reach in northern Essex County; southwest of Lowell it is expressed as a profound...Island-Connecticut junction to the mouth of the Merrimack River (fig. 1), and extends into Massachusetts...north and northwest by the southern limit of the Merrimack Group of Billings (1956), a boundary that coincides |
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| thermal history of a metamorphic terrain: New Hampshire, USA C. Page Chamberlain and Douglas Rumble III...terrain in central New Hampshire is characterized by over 9000 km 2 of primarily sillimanite-muscovite-bearing...the large-scale thermal structure of central New Hampshire can be explained by conductive heat transfer...affected the P - T paths of rocks in central New Hampshire. Within the region of abundant hot spots, the... The P - T paths in the central portion of New Hampshire, the area with the hot spots, are characterized |
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| EPA REGION 1 Connecticut Maine Massachusetts New Hampshire Rhode Island Vermont OPEN-FILE REPORT 93-292-A...REGION 1 Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont R. Randall Schumann...Preliminary Geologic Radon Potential Assessment of New Hampshire Linda C.S. Gundersen andR. Randall Schumann...directed to develop model standards and techniques for new building construction that would provide adequate...aerial radioactivity, and indoor radon data by county. Because of constraints on the scales of maps presented |
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| studiesof pelitic schists in the Merrimack Synclinorium, south-centralNew Hampshire C. PecB CHevrsent-erNr RND...Earth Sciences Dqrtmouth College, Hanover, New Hampshire 03755 Abstract Metamorphic isogradsin pelitic...rocks in nine 15' quadranglesin south-centralNew Hampshire are divisible into the upper 5 of Tracy's (1975)high-gradezones:...(2) the staurolite-sillimanite zone, (3) the sillimanite zone, (4) the sillimanite-alkali feldsparmuscovite...feldsparmuscovite zone, (5) the sillimanite-alkali feldspar zone, (6) and the sillimanite-alkali feldspar-cordierite |
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| understand the counterclockwise P±T evolution of the Merrimack synclinorium. The rocks were investigated with...is suggested by the widespread occurrence of sillimanite pseudomorphs after andalusite as well as abundant...studies of the quartz plagioclase±K-feldspar±sillimanite±biotite garnet cordierite assemblages in...produced intergrowths of pale green biotite sillimanite + quartz on cordierite and/or garnet grain boundaries...Eastern Washington University, Cheney, WA 99004, USA E-mail: jennifer.thomson@mailserver.ewu.edu Tel.: |
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| structure for controls on metamorphism: northern New England, USA Howard W. Day & C. Page Chamberlain S UMMARY:Isograds...of the Appalachian metamorphic belt in northern New England. Peak metamorphism occurred primarily during...of the Appalachian metamorphic belt in northern New England that bear on the interpretation of its metamorphic...observations. The Appalachian metamorphic belt in northern New England consists of a Precambrian basement overlain...domes along the Bronson Hill anticlinorium in New Hampshire and its extensions in northern Maine. West of |
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| PauL C. LYons ARTHUR H. BROWNLOW £ Studies in New England Geology A Memoir in Honor of C. Wroe Wolfe...GEOLOGICAL OF AMERICA SOCIETY er x ne Studies in New England Geology Edited by Paut C. LYons ArTHUR H...students were introduced to the complexities of New England Geology. In 1974 Dr. Wolfe received the Neil...interest in the earth sciences. Wolfe is best known to New England geologists as an astute crystallographer...his expertise on the mineralogy of pegmatites of New England, and for his work on the geology of the Boston |
 | DE YOREO, J. J., LUX, D. R., GUIDOTTI, C. V., DECKER, E. R., OSBERG, P. H. (1989) The Acadian thermal history of western Maine. Journal of Metamorphic Geology, 7 (2) 169-190 doi:10.1111/j.1525-1314.1989.tb00583.x | Journal (article/letter/editorial) |
| Sciences, Princeton University, Princeton, New lersey 08.h4, USA D . R. LUX, C. V . GUIDOTTI, E. R . DECKER...Sciences, University of Maine, Orono, Maine 04469, USA ABSTRACT Following the Middle Devonian Acadian deformation...extensive belt of high grade metamorphism was formed in New England. In south-western Maine, at the northern...metamorphism; thermal history. INTRODUCTION The New England metamorphic high, which extends several hundred...hundred kilometres along the axis of the Merrimack Synclinorium, reaches its northern terminus in south-western |
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| THE NEW HAMPSHIRE LOUIS GARNET DEPOSITS. C. CONANT. INTRODUCTION. SINCE I9IO an almostcontinuousproductionof...near North Wilmot, in the northernpart of Merrimack County. Smallerdepositsin the adjoiningtown of Danbury...origin. In I93o GeorgeW. White and Harold M. Mayo of New HampshireUniversityvisitedthe quarry,collected samples...granite") x Bardwell, E. S.: Garnet Milling in New Hampshire. Eng. and Min. Jour., vol. 9x, June x7, x9xx...North ConwayQuadranglein the White Mountains of New Hampshire. Proc. Amer. Acad. Arts and Sci., vol. 63, pp |
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| //' . GUIDEBOOK FOR FIELD IN ''fy,.'t:J TRIPS NEW ENGLAND NOVEMBER 10-12, 1952 Organized by the...Before visiting any of the sites described in the New England Intercollegiate Geological Conference guidebooks...Highlands of East-Central New York, Southern Vermont, and Southern New Hampshire Field Trip No. 2, Outstanding...Outstanding pegmatites of Maine and New Hampshire 73 Geology of the "Chelmsford Granite" 103 Field Trip...OF EAST-CENTRAL NEW YORK, SOUTHER Leaders: VERJ-IONT, AND SOUTHERN NEW HAMPSHIRE Marland P, Billings |
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| Selected Bibliography of Andalusite, Kyanite Sillimanite, Dumortierite Topaz, and Pyrophyllite in the... Selected Bibliography of Andalusite, Kyanite Sillimanite, Dumortierite Topaz, and Pyrophyllite in the...______-____________________________________ -________ Sillimanite _ _________________________________________________...SELECTED BIBLIOGRAPHY OF ANDALUSITE, KYANITE SILLIMANITE, DUMORTIERITE, TOPAZ, AND PYROPHYLLITE IN THE...compilation of 566 references on the kyanite, or sillimanite, group of minerals and pyrophyllite to December |
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| investigations in a polydeformed terrane in southwestern New Hampshire show that more than one stage of noncoaxial...of the Bellows Falls 15 minute quadrangles, New Hampshire. This region is situated between the axes of...Bronson Hill Anticlinorium, to the west, and the Merrimack Synclinorium, to the east (Fig. 1). Detailed stratigraphic...than one stage of folding. In southwestern New Hampshire, two stages of noncoaxial folding have created...METAMORPHISM 65 45* 43* 71 FIG. 1 Map of New Hampshire showing the study area (S) and its location |
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| Page Silurian(?) rocks. ........... 0 . 163 Merrimack Group ............ 163 Kittery Quartzito .......Formation ........ . . . . 171 Metamorphism in the Merrimack Group . . 173 Correlation and age of the Merriroack....146 14. Estimated modes of rocks from the Merrimack Group. ....... o ............. .166 15. Estimated...understanding of the geologic history of southeastern New England, particularly as it is revealed in the Lawrence...the mildly metamor- phosed Middle Silurian (?) Merrimack Group on the north from a highly metamorphosed |
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| Western Acadian metamorphism, central and western New England T. R . A R M S T R O N G , R . J . T R A...and State University, Blacksburg, VA 24061-0420, USA ABSTRACT The two major Early to Middle Palaeozoic...that lies along, or slightly above, the kyanite-sillimanite boundary on a P-T diagram. There is little or...conditions for the highest grade rocks known in New England: T = 650-750" C, P = 4.5-6.5 kbar for granulite...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 |
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| were metamorphosedto the chlorite zone through sillimanite-orthoclase zone. Some of these units proved to...to be fossiliferous even in the sillimanite zone. Early on, a relationship was recognizedbetweenhigh...particularly in the Merrimack synclinorium. New mapping near Mount Monadnock, based on the new stratigraphic... INrnonucltotl We discussan area in the central New England Appalachiansalong a tectonic belt extendingfrom...first proposal published in the Guidebook of the New England Intercollegiate Geological Conference in |
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| accessory-phase growth in low-pressure migmatites from SW New Hampshire JOSEPH M. PYLE* AND FRANK S. SPEAR Department...Sciences, Rensselaer Polytechnic Institute, Troy, New York 12180-3590, U.S.A. ABSTRACT Mineral compositions...found in migmatitic gneisses from near Gilsum, New Hampshire, constrain both peak metamorphic pressure (P)...During melt crystallization, low-Ti biotite + sillimanite replaced cordierite, and production of muscovite...assemblage as garnet + muscovite reacted to form sillimanite + biotite. Monazite (2) grew in a xenotime-bearing |
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| Connecticut, USA I . 1. AGUE Department of Geology and Geophysics, Yale University, PO Box 208109, New Haven...Haven, CT 06520-8 7 09, USA ABSTRACT A petrographic and petrological analysis of exceptionally well-preserved...the Merrimack synclinorium, north-eastern Connecticut, has been carried out in order to place new field-based...estimates of the maximum burial depth of the Merrimack synclinorium during the Acadian orogeny. The formation...heat and mass transfer. Key words: Connecticut, USA; deep crust; fluid flow; fractures; P-T path. INTRODUCTION |
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| Earth Sciences, Dartmouth College, Hanover, New Hampshire 03755 2 Geophysical Laboratory, 2801 Upton Street...within the regional metamorphic, sillimanite zone of New Hampshire, USA. These regions, or 'hot spots'...spots', measure 10-30 km2 in a sillimanite zone that extends 50 km east-west and over 150 km north-south. The...distance of a few kilometers, from 550 °C in the sillimanite zone to 700 °C in the granulite fades. Mineral...same distance from sillimanite-staurolite-muscovite-gamet-biotite-quartz to sillimanite-K feldspar-cord |
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| service click here to receive free e-mail alerts when new articles cite this article Permission request click...textures in a high-grade gneiss from western New Hampshire, USA. The P - T paths computed from relative thermometry...contoured by use of equations of type (8). Some of these new equations may be more useful than others for relative...course, there is no additional information in the new reactions formed by linear combinations of the N...from east-central Vermont and westcentral New Hampshire, USA. The P - T paths computed from zoned garnets |
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| All who were involved in the preparation of the new bedrock map, particularly those responsible for the...understanding and portrayal of the geology. Although the new map is very different from Emerson's in many aspects...part of the State are the Connecticut Valley and Merrimack "belts" of primarily Silurian and Devonian strata...PENNSYLVANIAN MISSISSIPPIAN i s - -~-^Chapte r B D Merrimack belt ^~ i MiDedham lfo-rd (U SILURIAN (U...1984, Lithotectonic assemblages as portrayed on the new bedrock geologic map of Massachusetts: American Journal |
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| IN THE PERRY MOUNTAIN AND MEGUNTICOOK FORMATIONS, NEW ENGLAND APPALACHIANS JENNIFER A. THOMSON§ Department...discontinuous lenses in Paleozoic formations in the New England Appalachians and other orogenic belts. Geochemical...Silurian Perry Mountain Formation of southern New Hampshire (near Rochester) and western Maine (near Rangeley)...Mountain Formation, Megunticook Formation, Maine, New Hampshire. SOMMAIRE Les coticules (quartzites grenatifères)...Perry Mountain (âge silurien moyen) du sud du New Hampshire, près de Rochester, et de l’ouest du Maine, |
