|Name||Scituate Granite Gneiss|
|Geologic age||Proterozoic Z?|
Metamorphic > GneissLight-pink to gray., medium- to coarse-grained, generally porphyritic, well-lineated and locally foliated granitic gneiss, composed of microcline, quartz, albite or orthoclase, biotite, hornblende, and magnetite. Megacrysts of microcline up to 3 cm long; lineation formed by splotches of biotite or by rods or quartz.
|Comments||Part of Eastern Uplands; Avalonian (Continental) Terrane; Avalonian Anticlinorium; Sterling Plutonic Group (Proterozoic Z?).|
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.
|Counties||New London - Windham|