Conanicut Group - Dutch Island Harbor Formation

Dark gray phyllite, commonly with rhythmically bedded Bouma sequences and brown-weathering carbonate beds that contain concretions 10-30 cm long.
State Rhode Island
Name Conanicut Group - Dutch Island Harbor Formation
Geologic age Cambro-Ordovician
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > PhylliteDark gray phyllite, commonly with rhythmically bedded Bouma sequences and brown-weathering carbonate beds that contain concretions 10-30 cm long.
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 Newport