|Name||New London Gneiss|
|Geologic age||Proterozoic Z?|
Metamorphic > GneissNew London consists of a layered facies and a massive facies. Layered facies described as alternating layers of light-colored biotite-quartz-plagioclase gneiss and amphibolite. Massive facies described as a granodiorite gneiss with a uniform texture, grain size, and color. Contains shiny black biotite plates and distinctive magnetite grains.
Metamorphic > Amphibolite
|Comments||Part of Eastern Uplands; Avalonian (Continental) Terrane; Avalonian 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||Middlesex - New London|