mica schist

Gray to green, fine-grained, thinly bedded schist consisting of muscovite, biotite, chlorite, and quartz. Locally contains think beds of quartzite, marble, and amphibolite. Includes rock mapped formerly as mica schist of Bristol, chlorite-biotite schist of Tiverton, and mica-chlorite schist of Sakonnet.
State Rhode Island
Name mica schist
Geologic age Late Proterozoic? or older?
Lithologic constituents
Major
Metamorphic > Schist > Mica-schistGray to green, fine-grained, thinly bedded schist consisting of muscovite, biotite, chlorite, and quartz.
Incidental
Metamorphic > Amphibolite
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Metamorphic > Metasedimentary > Metacarbonate > Marble
Comments Part of Esmond-Dedham Subterrane (East 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 Bristol - Newport