|Geologic age||Middle? Ordovician|
Metamorphic > GneissGray, medium- to coarse-grained, massive to well-foliated granitoid gneiss composed of oligoclase, quartz, microcline, and biotite (as patches), also epidote and hornblende in many areas, commonly associated with layers of amphibolite; elsewhere minor muscovite and garnet.
Metamorphic > Amphibolitecommonly associated with layers of amphibolite
|Comments||Part of Eastern Uplands; Iapetus (Oceanic) Terrane - Bronson Hill Anticlinorium|
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.
|Counties||Hartford - Middlesex - Tolland|