|Geologic age||Middle Ordovician or older|
Metamorphic > GneissMedium- to dark-gray, commonly greenish, medium-grained, well-layered gneiss, composed of hornblende, andesine, biotite, and epidote, commonly with quartz or garnet.
Metamorphic > Amphibolite
|Comments||Part of Eastern Uplands; Iapetus (Oceanic) Terrane - Merrimack Synclinorium|
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.
|Counties||New London - Windham|