Mineral Resources On-Line Spatial Data
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|Name||Ratlum Mountain Schist|
|Geologic age||Lower Ordovician|
|Original map label||Or?|
|Comments||Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Equivalents of Savoy Schist of Massachusetts (Emerson, 1898, 1917) and of Moretown Formation of Vermont and Massachusetts (Bedrock Geologic Map of Massachusetts, Zen and others, 1983) (includes Golden Hill and Ratlum Mountain Schists) (Lower? Ordovician) Same as Or|
|Primary rock type||schist|
|Secondary rock type||granofels|
|Other rock types||amphibolite; calc-silicate rock|
Metamorphic > Granoblastic > GranofelsGray, medium-grained, interlayered schist and granofels, composed of quartz, oligoclase, biotite, and garnet.
Metamorphic > SchistGray, medium-grained, interlayered schist and granofels, composed of quartz, oligoclase, muscovite (in the schist), biotite, and garnet, also staurolite and kyanite in the schist.
Metamorphic > Amphibolite
Metamorphic > Metasedimentary > Calc-silicate-rocksome of quartz-spessartine (coticule) and calc-silicate rock
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.
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 125,000.
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