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Catoctin Formation

Catoctin Formation - predominantly a greenstone. Basic lava flows, schist and gneiss, containing chlorite, plagioclase, amphibolite, and epidote. Includes minor quantities of arkose and thin clastics. Western subsurface extension presently unknown.
StateWest Virginia
NameCatoctin Formation
Geologic ageCambrian/Precambrian
Original map labelCPCc
CommentsThickness: Northeastern - Catoctin Formation (mainly greenstone) 1400 ft.
Primary rock typegreenstone
Secondary rock typeschist
Other rock typesgneiss; amphibolite; arkose
Lithologic constituents
Major
Metamorphic > Metaigneous > Greenstonegreenstone
Minor
Metamorphic > Schist
Incidental
Sedimentary > Clastic > Sandstone > ArkoseIncludes minor quantities of arkose and thin clastics
Metamorphic > Amphibolite
Metamorphic > Gneiss
Map references
Digital version of 1968 printed map available from http://wvgis.wvu.edu/data/data.php with the specific data available from http://wvgis.wvu.edu/data/dataset.php?action=search&ID=43
Unit references
Cardwell, D.H., Erwin, R.B., and Woodward, H.P., 1968 (slightly revised 1986), Geologic Map of West Virginia: West Virginia Geological and Economic Survey, Map 1, East Sheet, scale 1:250,000.
Geographic coverageJefferson

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