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Casco Bay

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Journal Article
Published: 01 March 2004
Geological Magazine (2004) 141 (2): 125–140.
...DAVID P. WEST, JR; RAYMOND A. COISH; PAUL B. TOMASCAK Abstract Ordovician metamorphic rocks of the Casco Bay Group are exposed in an approximately 170 km long NE-trending belt (Liberty-Orrington belt) in southern and south-central Maine. Geochemical analysis of rocks within the Spring Point...
FIGURES | View All (12)
Journal Article
Published: 19 June 2003
Canadian Journal of Earth Sciences (2003) 40 (6): 887–905.
...David P. West, Jr.; Heather M. Beal; Timothy W. Grover Abstract The Casco Bay Group in south-central Maine consists of a sequence of Late Cambrian to Early Ordovician interlayered quartzofeldspathic granofels and pelite (Cape Elizabeth Formation) overlain by Early to Late Ordovician back-arc...
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Published: 01 July 1999
DOI: 10.1130/0-8137-2331-0.1
Published: 01 July 1999
DOI: 10.1130/0-8137-2331-0.59
Published: 01 July 1999
DOI: 10.1130/0-8137-2331-0.85
Series: DNAG, Centennial Field Guides
Published: 01 January 1987
DOI: 10.1130/0-8137-5405-4.285
EISBN: 9780813754116
... Location This site consists of shoreline exposures of the Casco Bay Group between Spring Point, South Portland, and Two Lights State Park, Cape Elizabeth, and roadcuts along Maine 77 in Cape Elizabeth (Fig. 1). The following places are designated as stops where important aspects of the geology...
Image
Stratigraphic correlation chart for rocks in the <span class="search-highlight">Casco</span> <span class="search-highlight">Bay</span> area, coastal Ma...
Published: 01 December 2023
Fig. 3. Stratigraphic correlation chart for rocks in the Casco Bay area, coastal Maine, and selected correlative rocks in eastern Massachusetts (Nashoba terrane) and eastern Maine (Miramichi terrane). (1) Merrimack Group: Hepburn et al. (2021) use a combination of detrital zircon ages and cross
Image
Geological map of folded rocks of the upper <span class="search-highlight">Casco</span> <span class="search-highlight">Bay</span> Group in south-centra...
Published: 01 March 2004
Figure 3. Geological map of folded rocks of the upper Casco Bay Group in south-central Maine. Modified from ( West, 2002 ). The star indicates the sample location of the 469 ± 3 Ma U–Pb zircon age from the Spring Point Formation ( Tucker, Osberg & Berry, 2001 ). All samples collected
Image
Figure 1. Generalized geologic map of northern <span class="search-highlight">Casco</span> <span class="search-highlight">Bay</span> region of southwes...
Published: 01 July 2003
Figure 1. Generalized geologic map of northern Casco Bay region of southwestern Maine with apatite fission-track ages. Inset map shows location of this study area relative to overall Norumbega fault zone (NFZ). Geology is modified from Hussey (1988) and Hussey and Marvinney (2002) .
Image
Geologic map of folded rocks of the upper <span class="search-highlight">Casco</span> <span class="search-highlight">Bay</span> Group in south-central ...
Published: 19 June 2003
Fig. 3. Geologic map of folded rocks of the upper Casco Bay Group in south-central Maine. Modified from West ( 2002 ). Fm., Formation; Mbr., Member.
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Photographs of the <span class="search-highlight">Casco</span> <span class="search-highlight">Bay</span> Group in south-central Maine. ( a ) Interlayer...
Published: 19 June 2003
Fig. 4. Photographs of the Casco Bay Group in south-central Maine. ( a ) Interlayered quartzo-feldspathic granofels and mica schists of the Cape Elizabeth Formation. ( b ) Interlayered felsic gneisses (left) and amphibolites of the Spring Point Formation. ( c ) Rusty weathering, graphitic
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Tectonic time table for the upper part of the <span class="search-highlight">Casco</span> <span class="search-highlight">Bay</span> Group and the surro...
Published: 19 June 2003
Table 2. Tectonic time table for the upper part of the Casco Bay Group and the surrounding rocks in south-central Maine.
Published: 01 September 2010
DOI: 10.1130/2010.1206(10)
... Five belts of metamorphosed sedimentary and volcanic rocks underlie southwestern Maine and southeastern New Hampshire: Middle Ordovician Falmouth-Brunswick sequence; Middle and Late Ordovician Casco Bay Group, and Late Ordovician to Early Silurian rocks of the Merribuckfred Basin; Late...
Journal Article
Published: 01 December 2023
Canadian Journal of Earth Sciences (2024) 61 (2): 205–222.
...Fig. 3. Stratigraphic correlation chart for rocks in the Casco Bay area, coastal Maine, and selected correlative rocks in eastern Massachusetts (Nashoba terrane) and eastern Maine (Miramichi terrane). (1) Merrimack Group: Hepburn et al. (2021) use a combination of detrital zircon ages and cross...
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Journal Article
Published: 01 April 2008
Canadian Journal of Earth Sciences (2008) 45 (3): 287–301.
... of Casco Bay reveal a dramatic time–temperature discontinuity across the structure and suggest kilometre-scale late Mesozoic displacement in this region. However, new AFT and (U–Th)/He ages along the strike of the Norumbega fault system to the northeast and southwest of this discontinuity show...
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Journal Article
Published: 20 July 2011
Canadian Journal of Earth Sciences (2012) 49 (1): 189–205.
... in the Miramichi Highlands of New Brunswick and the Munsangan and Casco Bay volcanics of Maine, back-arc basin basalts of known peri-Gondwanan origins. Additionally, the Ammonoosuc Volcanics have Nd and Pb isotopic compositions indicative of peri-Gondwanan provenance. Thus, the Ammonoosuc Volcanics correlate...
FIGURES
Journal Article
Journal: GSA Bulletin
Published: 01 November 1993
GSA Bulletin (1993) 105 (11): 1478–1490.
... fault in the Casco Bay Group, early Carboniferous hornblende ages and late Carboniferous muscovite and biotite ages reflect slow cooling following Middle to late Devonian (Acadian) metamorphism and deformation. No significant (>300 °C) late Paleozoic thermal event affected these rocks. In contrast...
...-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...
Published: 01 January 1992
DOI: 10.1130/SPE268-p37
... Mesozoic dikes in southern Maine occur within a 15–20-km-wide northeast-trending coast-parallel swarm ~150 km in length. The swarm is best exposed from Kittery to Ogunquit, but extends northeast into the Casco Bay area and southwest into New Hampshire. The dikes are dominantly mafic (dolerites...