| State | Connecticut |
|---|---|
| Name | Foliated quartz diorite |
| Geologic age | Devonian in part, probably Ordovician in part |
| Lithologic constituents | Major
Metamorphic > Gneiss > Hornblende-gneissMainly dark-gray, medium-grained, well-foliated gneiss (locally strongly sheared, especially near contacts), composed of plagioclase, quartz, biotite, and hornblende, locally also pyroxene.
|
| Comments | Part of Eastern Uplands; Iapetus (Oceanic) Terrane - Merrimack Synclinorium |
| References | Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000. |
| NGMDB product | |
| Counties | Tolland - Windham |