Stratigraphy and Correlation of the Newbury Volcanic Complex, Northeastern Massachusetts

Shride, A.F.

doi:10.1130/mem148-p147

Cited by 26 publications

(19 citation statements)

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“…As summarized by Neuman et al (1989, pp. 80, 81), postOrdovician brachiopod and ostracode faunas show a continuing faunal isolation of Avalon from the Laurentian margin (also see Copeland and Berdan, 1977;Shride, 1976). Boucot (1993, p. 47) stressed that ''there must be a very important tectonic boundary that juxtaposes an eastern Coastal Acadia block with European biogeographic affinities to a terrane with North American biogeographic affinities''.…”

Section: Fredericton-merrimack Trough and New Brunswick Linementioning

confidence: 99%

“…1, CVA). The Newbury contains abundant andesite and related calcalkaline volcanics (Shride, 1976) of continental arc character (McKenna et al, 1993). Although exposures preclude determination of the original terrane association, the Newbury is reasonably inferred to be the volcanic expression of calc-alkalic intermediate to granitic Silurian and Early Devonian plutonism in the Putnam-Nashoba belt (Hepburn et al, 1995, p. 361;references therein).…”

Section: Coastal Volcanic Arcmentioning

confidence: 99%

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Stratigraphy, geochronology, and accretionary terrane settings of two Bronson Hill arc sequences, northern New England

Moench¹,

Aleinikoff²

2003

Physics and Chemistry of the Earth, Parts A/B/C

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The Ammonoosuc sequence is defined by the Middle Ordovician Ammonoosuc Volcanics near Littleton, NH, the type area, northeast to Milan, NH, and Oquossoc, ME; it also includes black slate of the Partridge Formation (C. bicornis--zone graptolites, $457 Ma). Related metamorphosed intrusives are the tonalitic Joslin Turn pluton (469 AE 2 Ma), the Cambridge Black granitic pluton (468 AE 3 Ma), and gabbro, tonalite (467 AE 4 Ma), and sheeted diabase of the Chickwolnepy intrusions. These intrusives cut lowermost Ammonoosuc (therefore >469 Ma). Probable uppermost Ammonoosuc is dated at 465 AE 6 and 461 AE 8 Ma. Successively below the Ammonoosuc are the Dead River and Hurricane Mountain Formations (flysch and melange), and the Jim Pond Formation (484 AE 5 Ma) and Boil Mountain Complex (both ophiolite), which are structurally underlain by the Neoproterozoic(?) Chain Lakes massif.The Quimby sequence is defined by the Lower Silurian(?) to Upper Ordovician Quimby Formation, composed of bimodal volcanics (443 AE 4 Ma) and sulfidic shale and graywacke that lie conformably to unconformably above the Ammmonoosuc Volcanics and Partridge Formation. Also in the Quimby sequence are several granitic to sparsely gabbroic plutons of the Highlandcroft (441-452 Ma) and Oliverian (435-456 Ma) Plutonic Suites, which intrude the Dead River, Ammonoouc and Partridge, but not the Quimby Formation.Based on faunal, paleolatitude, and isotopic data, the Ammonoosuc sequence and its correlatives and underlying sequences formed off the southern Laurentian margin, but northwest of the principal Iapetan suture, or Red Indian line. The Boil MountainJim Pond-Hurricane Mountain sequence was ramped northwestward over the Chain Lakes massif at $475 Ma, on the basal Boil Mountain surface. This obduction probably occurred slightly before obduction on the Baie Vert-Brompton surface (BBL), farther NW, over the Laurentian margin, and was followed by Dead River flysch sedimentation, which ended with the abrupt onset of Ammonoosuc-sequence arc magmatism at $470 Ma. Ammonoosuc eruptions probably ended at $460 Ma, when Iapetus closed along the Red Indian line.During a following magmatic hiatus of $3-5 m.y., now represented by portions of the Partridge Formation that overlie the Ammonoosuc Volcanics, subduction polarity reversed, and subduction resumed below the northwest-dipping Brunswick subduction complex (BSC) of New Brunswick, Canada. Quimby-sequence magmatism ($456-435 Ma) on the newly accreted Laurentian margin occurred above the BSC, whose footwall is now buried to the southeast by mainly Silurian clastic sediments of the MerrimackFredericton trough, deposited in the ''Fredericton Sea''. In Silurian to Early Devonian time, the NW-dipping BSC footwall was paired with a SE-dipping subduction zone that produced arc magmas of the Coastal Volcanic belt, built on the composite Avalon and adjacent peri-Avalonian terranes. Orogen-normal extension produced by rapid rollback of both subduction zones narrowed the Fredericton Sea, produced the Central Maine and Connecti...

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Section: Fredericton-merrimack Trough and New Brunswick Linementioning

confidence: 99%

Section: Coastal Volcanic Arcmentioning

confidence: 99%

Stratigraphy, geochronology, and accretionary terrane settings of two Bronson Hill arc sequences, northern New England

Moench¹,

Aleinikoff²

2003

Physics and Chemistry of the Earth, Parts A/B/C

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“…Most of the known prehistoric quarry sites in southeastern New England that served as sources of felsitic rocks are within the Lynn/ Mattapan, Blue Hill, and Wamsutta volcanic complexes (MHC, 1980;Ritchie and Hermes, 1992). The Newbury volcanics (located north of the Boston basin; Shride, 1976) and the Spencer Hill volcanics of central Rhode Island (Hermes et al, 1994) also contain felsitic rocks that may represent potential lithic source areas. These complexes contain volcanic rocks displaying a wide range of color, textures, and weathering patterns that present a challenge to lithic sourcing studies.…”

Section: Introductionmentioning

confidence: 98%

Application of petrographic and geochemical methods to sourcing felsitic archaeological materials in Southeastern New England

Hermes

Ritchie²

1997

Geoarchaeology

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“…Accordingly, the age of the Boston Bay Group could be limited to, and is most likely, Proterozoic Z and possibly Early Cambrian. The Boston Bay Group is shown as Paleozoic or Proterozoic Z on a new bedrock geologic map of Massachusetts (Zen and others, 1981) (Shride, 1976;Billings, 1976) and with the Proterozoic Zor younger Mattapan Volcanic Complex (see discussions by Shride, 1976, p. 173-174, andBillings, jn Skehan andothers, 1979, p. AI7-AI8). The Lynn is intruded by alkalic grariTte of the Quincy type (LaForge, 1932, p. 33), but, according to R. L. Zartman (oral commun.. I960), two groups of alkalic rocks exist in the area, one of Ordovician age (Quincy type) and one of Devonian age (Peabody type).…”

Section: Stratified Rocksmentioning

confidence: 99%

Stratigraphic notes, 1980-1982

1982

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Stratigraphy and Correlation of the Newbury Volcanic Complex, Northeastern Massachusetts

Cited by 26 publications

References 0 publications

Stratigraphy, geochronology, and accretionary terrane settings of two Bronson Hill arc sequences, northern New England

Stratigraphy, geochronology, and accretionary terrane settings of two Bronson Hill arc sequences, northern New England

Application of petrographic and geochemical methods to sourcing felsitic archaeological materials in Southeastern New England

Stratigraphic notes, 1980-1982

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