Basal member [of The Straits Schist] (CTStb;0)

Basal member [of The Straits Schist]

( = Russell Mountain Formation of Massachusetts) - Distinguished by presence of layers of amphibolite, marble, calc-silicate rock, and quartzite within more uniform schist like that on either side. Minor, unevenly distributed mineralization in W, Bi, Cu, Ni, and other metals.

State	Connecticut
Name	Basal member [of The Straits Schist]
Geologic age	Silurian
Lithologic constituents	Major Metamorphic > Metasedimentary > Metacarbonate > Marble Metamorphic > Amphibolite Metamorphic > Schist Minor Metamorphic > Metasedimentary > Calc-silicate-rock Metamorphic > Metasedimentary > Metaclastic > Quartzite
Comments	Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Hartland Belt
References	Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.
NGMDB product	NGMDB product page for 54245
Counties	Fairfield - Hartford - Litchfield - New Haven

Basal member [of The Straits Schist]

Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.