State | Rhode Island |
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Name | Blackstone Group - greenstone, amphibolite, serpentinite |
Geologic age | Late Proterozoic? or older? |
Lithologic constituents | Major
Metamorphic > AmphiboliteDark-green, massive to foliated metamorphosed gabbroic and basaltic rock interlayered with epiclastic rock; local pillow-structures preserved. Consists primarily of epidote, actinolite, chlorite, and plagioclase.
Metamorphic > Metaigneous > GreenstoneDark-green, massive to foliated metamorphosed gabbroic and basaltic rock interlayered with epiclastic rock; local pillow-structures preserved. Consists primarily of epidote, actinolite, chlorite, and plagioclase.
Metamorphic > Metaigneous > SerpentiniteDark-green, massive to foliated metamorphosed gabbroic and basaltic rock interlayered with epiclastic rock; local pillow-structures preserved. Consists primarily of epidote, actinolite, chlorite, and plagioclase.
|
Comments | Part of Esmond-Dedham Subterrane (West Bay Area) |
References | Hermes, O.D. (comp.), Gromet, L.P. (comp.), Murray, D.P. (comp.), Hamidzada, N.A., Skehan, J.W., and Mosher, S., 1994, Bedrock geologic map of Rhode Island: Rhode Island Map Series No. 1, Kingston, Rhode Island, scale 1:100,000. |
NGMDB product | |
Counties | Kent - Providence |