|Geologic age||Lower Cambrian and perhaps partly older|
Metamorphic > Metasedimentary > Metaclastic > Quartzitefeldspathic quartzite; layers of purer quartzite in many areas, especially near the top or where the formation is thin.
Metamorphic > GneissComposed of quartz, microcline, plagioclase, muscovite, biotite, and generally tourmaline; some schistose micaceous layers have sillimanite; commonly as quartz-sillimanite nodules rimmed with muscovite.
|Comments||Part of Western Uplands; Proto-North American (Continental) Terrane - Carbonate Shelf|
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.
|Counties||Fairfield - Litchfield|