|Geologic age||Lower Ordovician or Cambrian or both|
Metamorphic > SchistLight-gray to silvery, fine- to medium-grained, generally poorly layered schist, composed of quartz, muscovite, biotite, oligoclase, and generally garnet, staurolite, and kyanite or sillimanite.
Metamorphic > Granoblastic > Granofels
Metamorphic > Amphibolite
Metamorphic > Metasedimentary > Calc-silicate-rockquartz-spessartine rock (coticule), and calc-silicate rock.
|Comments||Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Same as OCAr|
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.