|Geologic age||Proterozoic Y|
Metamorphic > GneissGray, medium-grained, well-foliated and generally well layered, light and dark, but locally wispy gneiss, composed of quartz and plagioclase, with microcline locally in the light layers and abundant biotite and common hornblende in the dark layers; garnet or epidote locally.
Metamorphic > AmphiboliteLayers and lenses of amphibolite in some areas.
Metamorphic > Metasedimentary > Calc-silicate-rockLayers and lenses of calc-silicate rock in some areas.
|Comments||Part of Western Uplands; Proto-North American (Continental) Terrane - Proterozoic Massifs - ""Grenville""|
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 - Litchfield|