| State | Rhode Island |
|---|---|
| Name | Harmony Group - Nipsachuck Formation |
| Geologic age | Late Proterozoic? or older? |
| Lithologic constituents | Major
Metamorphic > GneissGray to tan, fine- to medium-grained granite gneiss, characterized by biotite streaks. Consists of biotite, muscovite, quartz, microperthite, and sodic 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 | Providence |