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western New Hampshire

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Journal Article
Journal: Geosphere
Published: 02 May 2025
Geosphere (2025) 21 (3): 511.
....—Massachusetts; NHS—New Hampshire sequence; RI—Rhode Island. ...
FIGURES
Journal Article
Journal: Geosphere
Published: 09 April 2025
Geosphere (2025) 21 (3): 418–445.
... and a reexamination of existing whole-rock geochemistry, enable a new analysis of the tectonic history of the ancient Laurentian-Ganderian margin in the northern Appalachians of New England, USA, and southeastern Canada. The whole-rock geochemical data from the Ordovician BHA in western New Hampshire indicate...
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Journal Article
Journal: Geosphere
Published: 11 December 2019
Geosphere (2020) 16 (1): 229–257.
...Peter M. Valley; Gregory J. Walsh; Arthur J. Merschat; Ryan J. McAleer Abstract U-Pb zircon geochronology by sensitive high-resolution ion microprobe–reverse geometry (SHRIMP-RG) on 11 plutonic rocks and two volcanic rocks from the Bronson Hill arc in western New Hampshire yielded Early to Late...
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Journal Article
Journal: GSA Bulletin
Published: 01 December 1985
GSA Bulletin (1985) 96 (12): 1493–1507.
...GERHARD W. LEO Abstract The Ammonoosuc Volcanics and equivalent rocks of Ordovician age are exposed in the Oliverian domes along the Bronson Hill anti-clinorium (BHA) between northern New Hampshire and southern Connecticut. In western New Hampshire and adjacent Vermont and Massachusetts...
Journal Article
Journal: GSA Bulletin
Published: 01 March 1969
GSA Bulletin (1969) 80 (3): 405–428.
...RICHARD S NAYLOR Abstract New information on the origin of mantled gneiss domes comes from a study of the Oliverian Domes in western New Hampshire. Fieldwork indicates that the core of the Mascoma Dome (a representative Oliverian Dome) can be subdivided into two major units: (1) massive gneiss...
Journal Article
Journal: GSA Bulletin
Published: 01 July 1958
GSA Bulletin (1958) 69 (7): 855–870.
...) in eastern Vermont contains tetracorals of Silurian or Devonian age. The Clough Formation on Croydon Mountain (sillimanite zone) in west-central New Hampshire contains tetracorals. The fossiliferous zone in the lower part of the Bernardston Formation is possibly equivalent to the upper part of the Clough...
Journal Article
Journal: GSA Bulletin
Published: 01 May 1941
GSA Bulletin (1941) 52 (5): 633–648.
...F. C. KRUGER; D. LINEHAN, S. J. Abstract Geological mapping in western New Hampshire has delineated bodies of orthogneiss lying in structural basins of quartzite and schist. The object of the present investigation was to test the utility of seismic reflection methods for determining the depths...
Journal Article
Journal: GSA Bulletin
Published: 01 February 1938
GSA Bulletin (1938) 49 (2): 289–302.
... intrusives. In the Littleton and Moosilauke quadrangles of westernmost New Hampshire (Fig. 1) high-grade metamorphic rocks were developed without any notable introduction of material from external sources (Billings, 1937, p. 544–545). Farther east, however, after high-grade metamorphic rocks were formed...
Series: GSA Memoirs
Published: 23 January 2023
DOI: 10.1130/2022.1220(26)
EISBN: 9780813782201
... in northern New Hampshire and western Maine. Collectively, the new geochronology and mapping results constrain the timing of magmatism, sedimentation, metamorphism, and deformation. The Bronson Hill arc formed on Gondwana-derived basement and experienced prolonged magmatic activity before and after a ca. 460...
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Journal Article
Journal: GSA Bulletin
Published: 01 October 1949
GSA Bulletin (1949) 60 (10): 1613–1670.
... the western one-eighth of the area. The Northey Hill thrust, a major fault of western New Hampshire, separates the Bronson Hill anticline from the Brattleboro syncline. This thrust, which cuts out the eastern limb of the Brattleboro syncline, has a stratigraphic separation of about 10,000 feet. Foliation...
Journal Article
Journal: GSA Bulletin
Published: 01 July 1996
GSA Bulletin (1996) 108 (7): 872–882.
... which has been overfolded from east to west, and just touches the present Earth's surface. Recent pressure-temperature-time ( P-T-t ) metamorphic studies in western New Hampshire have led to proposals that there is a series of nested thrust plates involving the Bronson Hill and adjacent terranes...
Journal Article
Journal: Geology
Published: 01 February 1989
Geology (1989) 17 (2): 185–189.
...T. Mark Harrison; Frank S. Spear; Matthew T. Heizler Abstract 40 Ar/ 39 Ar analyses of muscovite, biotite, and K-feldspar from central New England reveal a remarkable pattern of mineral ages: the ages are progressively younger from central to western New Hampshire and rise sharply near the Vermont...
Journal Article
Journal: GSA Bulletin
Published: 01 May 1950
GSA Bulletin (1950) 61 (5): 449–492.
...JACOB FREEDMAN Abstract The chief problem in the Mt. Pawtuckaway quadrangle was to determine the relation of the early and middle Paleozoic rocks of western and central New Hampshire to supposed Pennsylvanian rocks of southeastern New Hampshire. A related problem was to determine the stratigraphic...
Journal Article
Journal: GSA Bulletin
Published: 01 February 1946
GSA Bulletin (1946) 57 (2): 161–206.
... and bedding are parallel. The Northey Hill thrust, a major fault that can be traced for at least 100 miles in western New Hampshire, separates the Walpole and Charlestown synclines from one another. It is pre-metamorphism and is now a high-angle fault along which the stratigraphic throw is approximately...
Journal Article
Published: 01 September 2005
The Journal of Geology (2005) 113 (5): 535–552.
...Mary K. Roden-Tice; Steven J. Tice Abstract Apatite fission-track (AFT) ages of 178 to 70 Ma for 108 samples from the Adirondack Mountains and eastern New York State, Vermont, western Massachusetts and Connecticut, and western New Hampshire indicate that widespread unroofing occurred throughout...
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Book Chapter

Author(s)
Richard S. Naylor
Series: DNAG, Centennial Field Guides
Published: 01 January 1987
DOI: 10.1130/0-8137-5405-4.243
EISBN: 9780813754116
... Location The Mascoma Dome is located in central western New Hampshire about 12 mi (20 km) east of the towns of Lebanonand Hanover (Fig. 1). Groups of outcrops at two localities aredescribed. Most of the major rock units can be seen by visitingeither locality separately, but some relationships...
Series: GSA Special Papers
Published: 01 January 1964
DOI: 10.1130/SPE77-p1
... Albee in western New Hampshire and is correlated with the lower part of the Moretown Formation of Vermont and the lower part of the Beauceville Formation of the Eastern Townships. The Dixville is correlated with the Partridge and Ammonoosuc Formations of northwestern New Hampshire, the Cram Hill...
Journal Article
Journal: GSA Bulletin
Published: 01 June 1942
GSA Bulletin (1942) 53 (6): 889–916.
...CARLETON A. CHAPMAN Abstract Study of the Croydon and Unity domes sheds considerable light on the mode of intrusion of the Oliverian magma series in western New Hampshire. Each dome consists of an igneous core (late Devonian) surrounded by concentric belts of older (Ordovician?, Silurian, and early...
Journal Article
Journal: GSA Bulletin
Published: 01 November 2004
GSA Bulletin (2004) 116 (11-12): 1392–1407.
... fault, covers a much smaller area than suggested previously, and is limited to the vicinity of Piermont, western New Hampshire. The allochthon, which primarily consists of rocks correlated with the Silurian age Rangeley Formation of Maine, has horizons of metamorphosed polymictic conglomerate at its...
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Journal Article
Published: 01 April 2003
American Mineralogist (2003) 88 (4): 624–638.
...-clockwise P-T-t evolution is implied in the Central Maine belt, consistent with that proposed for Acadian metamorphism in western New Hampshire. * E-mail: [email protected] 05 12 2002 31 07 2002 © 2003 American Mineralogist 2003 Characteristic low-variance subsolidus...
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