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Ultramafic rock

Ultramafic rock - Ultramafic rock, originally composed of olivine and pyroxene, now generally altered to tremolite, talc, chlorite, or serpentine.
StateConnecticut
NameUltramafic rock
Geologic ageOrdovician or older
Original map labelu
CommentsPart of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium, AND Eastern Uplands; Iapetus (Oceanic) Terrane - Bronson Hill Anticlinorium.
Primary rock typeultramafic intrusive rock
Secondary rock typeserpentinite
Other rock types
Lithologic constituents
Major
Igneous > Plutonic > UltramaficUltramafic rock, originally composed of olivine and pyroxene, now generally altered to tremolite, talc, chlorite, or serpentine.
Minor
Metamorphic > Metaigneous > SerpentiniteUltramafic rock, originally composed of olivine and pyroxene, now generally altered to tremolite, talc, chlorite, or serpentine.
Map references
Connecticut Geological and Natural History Survey, DEP, in cooperation with the U.S. Geological Survey, 2000, Bedrock Geology of Connecticut, data format: shapefile, file name: bedrock, downloaded from: http://magic.lib.uconn.edu/cgi-bin/MAGIC_DBsearch2.pl?Geography=37800&Loc=0000 on 9/18/2003, scale 1:50,000.
Unit references
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 125,000.
Geographic coverageFairfield - Hartford - Litchfield - Middlesex - New Haven

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