Narragansett Bay Group - Rhode Island Formation

In northern Rhode Island, consists of gray to black, fine- to coarse-grained quartz arenite, litharenite, shale, and conglomerate, with minor beds of anthracite and meta-anthracite. In southern Rhode Island, consists of meta-sandstone, meta-conglomerate, schist, carbonaceous schist, and graphite. Plant fossils are common.
State Rhode Island
Name Narragansett Bay Group - Rhode Island Formation
Geologic age Pennsylvanian
Lithologic constituents
Sedimentary > Coal > AnthraciteIn northern Rhode Island: minor beds of anthracite and meta-anthracite
Comments Part of Esmond-Dedham Subterrane. Narragansett Bay Group - deposited upon older rocks of both West Bay and East Bay parts of the Esmond-Dedham subterrane.

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 - Kent - Newport - Providence - Washington