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National Geologic Map Database
Geologic Unit: Erving
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Map showing publication footprint
  • Usage in publication:
    • Erving Formation*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • New England province
Publication:

Zen, E-an (editor), Goldsmith, Richard (compiler), Ratcliffe, N.M. (compiler), Robinson, Peter (compiler), Stanley, R.S. (compiler), Hatch, N.L., Jr., Shride, A.F., Weed, E.G.A., and Wones, D.R., 1983, Bedrock geologic map of Massachusetts: U.S. Geological Survey [State Geologic Map], 3 sheets, scale 1:250,000


Summary:

Erving Formation mapped in Bronson Hill anticlinorium as undivided and as three informal subdivisions where possible to map separately: 1) mixed mica schist and amphibolite, 2) granofels and schist, and 3) amphibolite. Age is Early Devonian.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Erving Formation*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • New England province
Publication:

Rodgers, John, 1985, Bedrock geological map of Connecticut: Connecticut Geological and Natural History Survey, scale 1:125,000


Summary:

Extended to Connecticut in Bronson Hill anticlinorium. Age generalized to Devonian.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Erving Formation*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • New England province
Publication:

Hatch, N.L., Jr., Robinson, Peter, and Stanley, R.S., 1988, Stratigraphy of the Connecticut Valley belt, Chapter B, IN Hatch, N.L., Jr., ed., Bedrock geology of Massachusetts: U.S. Geological Survey Professional Paper, 1366-A-D, p. B1-B34.


Summary:

Erving Formation in its type area consists of gray, well-bedded fine-grained, quartz-plagioclase-biotite granulite with very thin to thick beds of muscovite-biotite schist. Second most abundant rock type is hornblende-andesine-epidote-sphene amphibolite; occurs west of Pelham dome, as well as in areas around Quabbin Hill, Wilbraham, Whately, and Leeds. Pink coticule granulite occurs within main granulite bodies, usually within 1 to 2 m of contact with amphibolite; common in type area, as well as near Leverett and near Quabbin Hill on shores of Quabbin Reservoir. Near base of formation in Wilbraham area, includes a unit of interlayered amphibolite and gray to rusty schist. In most areas, Erving is highest exposed unit, except in Wilbraham and Whately areas where it is overlain by Waits River and Gile Mountain Formations, respectively. Thicknesses vary from 200 to 900 m. Age is Devonian in this report. [Papers presented as chapters in U.S. Geological Survey Professional Paper 1366 are intended as explanations and (or) revisions to MA State bedrock geologic map of Zen and others (1983) at scale of 1:250,000.]

Source: GNU records (USGS DDS-6; Reston GNULEX).


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