1-20 OF 68 RESULTS FOR

Merrimack Terrane

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE245-p171
... and are assigned to the Merrimack terrane. A 46.1-m section of biotite granitic gneiss within the Hebron Formation at Moodus correlates with the Canterbury gneiss. Below the Hebron Formation is 26.2 m of mylonitic muscovite-biotite-plagioclase-quartz schist, and 79.2 m of mylonitic, strongly layered garnet...
Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE245-p209
... orthogneiss. Rocks originally mapped as Brimfield Formation (Merrimack terrane) west of Old Saybrook are shown to correlate with the Middletown Formation of the Bronson Hill terrane. This new correlation makes all plagioclase gneisses of the Killingworth dome isolated from rocks of other terranes...
Series: GSA Memoirs
Published: 01 January 1976
DOI: 10.1130/MEM146-p203
...). These features were produced throughout the whole geosyncline that was ancestral to the Merrimack synclinorium; they characterize the structure of the greenschist terrane. But southwestward across the transition zone, they are increasingly blurred by younger superposed structural and metamorphic features...
Journal Article
Published: 01 January 2005
Geological Magazine (2005) 142 (1): 7-22.
...’ of Eusden & Lyons (1993) . The Merrimack trough is interpreted to be a sedimentary basin developed over the sutured Laurentia and Medial New England, whereas the Fredericton trough (and correlative terranes) represents a foredeep basin that underwent a period of folding and E-directed thrusting (Fig...
FIGURES | View All (10)
Journal Article
Published: 01 June 1983
American Mineralogist (1983) 68 (5-6): 530-540.
.... This early metamorphism has been strongly overprinted by M(2) metamorphism, which locally attained cordierite-alkali feldspar grade and produced the dominant isograd pattern. M(2) metamorphism cross cuts Devonian Kinsman and Spaulding Series plutons in this region. M(3) locally retrograded the M(2) terrane...
Series: GSA Memoirs
Published: 01 January 1969
DOI: 10.1130/MEM120-p1
.... In wet Paleozoic rocks, midway between the dry terranes of the basement and the domes and arches, garnet was replaced by chlorite and kyanite was replaced by muscovite as a result of uplift, denudation and cooling. In Quebec, an exogeosyncline containing about 5000 feet of rocks overlies...
Series: GSA Memoirs
Published: 01 January 1983
DOI: 10.1130/MEM158-p55
... Recent discoveries in the North American Cordillera of composite exotic terranes that had become accreted to the Cordillera during its evolution require reexamination of the older Appalachian mountain systems for evidence of possibly similar history. In the New England segment...
Journal Article
Journal: GSA Bulletin
Published: 01 July 1977
GSA Bulletin (1977) 88 (7): 925-934.
... of the Merrimack synclinorium to the north and west. The east-trending Honey Hill fault marks the southern end of the Merrimack synclinorium. Four fields denoting different levels and patterns of radioactivity coincide with major geologic provinces. The granite-gneiss terrane, which contains abundant potassic...
Series: GSA Special Papers
Published: 01 January 1993
DOI: 10.1130/SPE275-p1
...-Central Maine belt, (5) Richmond belt, (6) Casco Bay belt, (7) Benner Hill belt, (8) St. Croix-Ellsworth belt, (9) Mascarene belt, and (10) Avalon belt. The decision as to whether each of these belts represents a separate terrane is at present reserved. In the coastal Maine zone the situation...
Series: GSA Special Papers
Published: 01 January 1989
DOI: 10.1130/SPE230-p193
... Upper Proterozoic rocks of the Avalon zone constitute much of the eastern basement of the New England Appalachians and have played a major role in its evolution. Avalonian rocks in southeastern New England are a composite of at least two distinct assemblages definable as terranes, the Esmond...
Journal Article
Published: 28 March 2018
Seismological Research Letters (2018) 89 (3): 1197-1211.
... that this is the depth range of the 1638 rupture. Depending on the depth of the pre‐Silurian basement of the Central Maine terrane, the active structure in the 1638 earthquake may have been a basement‐involved thrust fault or a reactivated east‐dipping thrust fault located between the nappes of the overlying Silurian...
FIGURES | View All (10)
Journal Article
Published: 24 November 2011
Canadian Journal of Earth Sciences (2011) 49 (1): 239-258.
...-Gondwanan Gander terrane, finally closed. Here, we extrapolate this suture into New England, placing it between the Liberty–Orrington–Miramichi inliers (LOM) and the Merrimack–Fredericton trough (MFT). Southeastward, marine strata of the MFT overlie the TEB passive margin, exposed in the Ganderian St. Croix...
FIGURES | View All (5)
Journal Article
Published: 01 December 1995
Bulletin of the Seismological Society of America (1995) 85 (6): 1541-1559.
...Christel G. Hennet; Robert B. Hawman; Robert A. Phinney Abstract We discuss some of the advantages and pitfalls associated with τ( p ) analysis of wide-angle profiles recorded over terranes characterized by significant lateral heterogeneity. We construct composite slant stacks for a pair...
Journal Article
Journal: Lithosphere
Published: 01 December 2009
Lithosphere (2009) 1 (6): 337-342.
... Formation, the Fish Brook Gneiss, and the Marlboro Formation. The Nashoba terrane is an early Paleozoic peri-Gondwanan arc-backarc separated from the Merrimack terrane to the west by the Clinton-Newbury fault zone and from the Avalon terrane to the east by the Bloody Bluff fault ( Fig. 1 ). It consists...
FIGURES | View All (5)
Journal Article
Published: 01 November 2018
American Mineralogist (2018) 103 (11): 1851-1868.
... crustal processes. 8 3 2018 16 7 2018 The Brimfield Schist hosts the rocks of this study and is one of several rock units cut and/or bounded by west-northwest-dipping thrust faults within the southern Central Maine Terrane (CMT; also known as, for example, the Merrimack Synclinorium...
FIGURES | View All (10)
Journal Article
Journal: GSA Bulletin
Published: 01 June 2000
GSA Bulletin (2000) 112 (6): 900-914.
... Hampshire along the boundary between the Central Maine terrane and the Merrimack trough (Fig. 1) . Pera-luminous plutons with Al-rich biotites are located along the axis of the Central Maine terrane and in the Connecticut Valley trough of Vermont. But even within the Central Maine terrane...
FIGURES | View All (11)
Journal Article
Published: 01 May 2007
Journal of Paleontology (2007) 81 (3): 490-512.
... the Kolyma Terrane, which has an enigmatic paleogeographic position during the Early Paleozoic. Hamarodus europaeus occurs in Rawtheyan and Hirnantian strata in England and Wales ( Orchard, 1980 ), representing the North Atlantic Realm. It is present in the A. ordovicicus Zone, Rawtheyan, in northern...
FIGURES | View All (10)
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2433(15)
... Recognition of the timing of peak metamorphism in the eastern Blue Ridge (ca. 460 Ma), Inner Piedmont (ca. 360 Ma), and Carolina terrane (ca. 540 Ma) has been critical in discerning the history of the collage of terranes in the hinterland of the southern Appalachian orogen. The Inner Piedmont...
Journal Article
Published: 01 May 2012
American Mineralogist (2012) 97 (5-6): 840-855.
...Jay J. Ague; James O. Eckert, Jr. Abstract We report the discovery of oriented needles of rutile and ilmenite in garnet crystals from granulite facies metapelitic rocks of the Merrimack synclinorium, Connecticut, and present a precipitation model for their origin. The rocks were strongly...
FIGURES | View All (12)
Journal Article
Published: 01 April 2005
American Mineralogist (2005) 90 (4): 592-606.
... produced during a regional low-pressure, high-temperature metamorphism active between 380–350 Ma. The regional metamorphism is ascribed to lithospheric mantle delamination, followed by asthenospheric mantle upwelling, which heated a wide area of the Merrimack basin (southwestern New Hampshire, central...
FIGURES | View All (11)