Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > Connecticut
|Geologic age||Middle? Ordovician|
|Original map label||Ogl|
|Comments||Part of Eastern Uplands; Iapetus (Oceanic) Terrane - Bronson Hill Anticlinorium|
|Primary rock type||granitic gneiss|
|Secondary rock type||amphibolite|
|Other rock types|
Metamorphic > GneissGray, medium- to coarse-grained, massive to well-foliated granitoid gneiss composed of oligoclase, quartz, microcline, and biotite (as patches), also epidote and hornblende in many areas, commonly associated with layers of amphibolite; elsewhere minor muscovite and garnet.
Metamorphic > Amphibolitecommonly associated with layers of amphibolite
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.
|Geographic coverage||Hartford - Middlesex - Tolland|
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