East Harpswell Group

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Series: GSA Memoirs
Published: 01 September 2010
DOI: 10.1130/2010.1206(10)
... Ordovician to Early Silurian rocks of the East Harpswell Group; Silurian to Early Devonian rocks of the Central Maine Basin; and highly tectonized enigmatic rocks of the Rye complex of uncertain age. Stratigraphic reassessment and new U/Pb zircon ages support a model of east-directed Middle Ordovician...
Journal Article
Published: 01 January 2015
European Journal of Mineralogy (2015) 27 (1): 19–29.
... those essential to porphyroblast crystallization. Sample HN05-18 is a metapelite from the Jewell Formation, a pelitic unit of the Casco Bay Group at Harpswell Neck, Maine, USA. The mineral assemblage is biotite + chlorite + garnet + muscovite + quartz + plagioclase + ilmenite + chalcopyrite...
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Journal Article
Journal: Geology
Published: 01 July 2003
Geology (2003) 31 (7): 649–652.
...-Brunswick sequence, (3) the Middle to Late Ordovician Casco Bay Group, and (4) the Late Ordovician–Early Silurian East Harpswell Group. All of the stratified rocks in the area of Figure 1 were metamorphosed to amphibolite facies conditions during the middle to late Paleozoic. (See Hussey [1988...
Journal Article
Published: 01 March 2009
Journal of the Geological Society (2009) 166 (2): 201–204.
... of the Scottish Caledonides (Fig. 1 ). The Moine rocks and probably correlatives east of the Great Glen Fault were affected by mid-amphibolite-facies ’Knoydartian' metamorphism and intruded by syntectonic pegmatites at c . 790–840 Ma (e.g. Noble et al . 1996 ; Rogers et al . 1998 ; Vance et al . 1998...
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 01 December 2014
Lithosphere (2014) 6 (6): 409–418.
... © 2014 Geological Society of America 2014 Figure 1. (A) Sketch of the Variscan belt with location of the Órdenes complex. (B) Map of the Órdenes complex with indication of the main units and groups of units and the location of cross sections. MP—medium pressure; HP-HT—high-pressure–high...
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Journal Article
Published: 01 February 2005
The Canadian Mineralogist (2005) 43 (1): 157–182.
... and Molare synclines, and developed the main penetrative foliation, which strikes east–west and dips steeply north. The third phase produced a weak crenulation cleavage and small-scale folds whose axial planes strike southeast and dip shallowly to the northeast, with fold axes plunging shallowly to the east...
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Journal Article
Journal: AAPG Bulletin
Published: 15 June 2019
AAPG Bulletin (2019) 103 (6): 1321–1350.
... sedimentary strata, which become progressively more marine downdip toward the south and southeast. The basin is bordered by the Long Island platform and the Gulf of Maine to the west and by the Yarmouth arch and LaHave platform to the east ( Poppe and Poag, 1993 ). The New England seamounts extend...
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Journal Article
Published: 01 August 2017
Reviews in Mineralogy and Geochemistry (2017) 83 (1): 55–102.
... and products of a metamorphic reaction or between different groups of minerals, such as between domains ( Fisher 1973 ). In this context, equilibration is attained when the chemical potentials of each the chemical component in the system of interest is equalized across a rock. Several studies on equilibrium...
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Journal Article
Published: 01 August 2017
Reviews in Mineralogy and Geochemistry (2017) 83 (1): 469–533.
... become available (e.g., Ghent 1976 , 1977 ; Newton and Haselton 1981 ; Koziol and Newton 1988 ; McKenna and Hodges 1988 ; Berman 1990 ; Holdaway 2001 ; Caddick and Thompson 2008 ). The relative performance of most of these calibrations was compared by Wu and Cheng (2006) , but taken as a group...
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