| State | Rhode Island |
|---|---|
| Name | diabase |
| Geologic age | Triassic? |
| Lithologic constituents | Major
Igneous > Hypabyssal (Diabase)Greenish-gray to gray-black, fine-grained, commonly porphyritic, generally massive dike rock composed of plagioclase, augite, opaque minerals, olivine pseudomorphed by serpentine and chlorite minerals, and sparse quartz.
|
| Comments | Part of Avalon Terrane |
| 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 - Newport - Providence |