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Harpers Formation

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Harpers Formation (Chilhowee Group) - greenish-gray phyllite, with interbeds of fine-grained quartzite.
State West Virginia
Name Harpers Formation
Geologic age Cambrian
Comments Thickness: Northeastern 1200 ft, Southeastern - Chilhowee Group 1200 ft (estimate only).
Primary rock type phyllite
Secondary rock type quartzite
Other rock types
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Phyllitegreenish-gray phyllite
Minor
Metamorphic > Metasedimentary > Metaclastic > Quartzitewith interbeds of fine-grained quartzite.
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.
Counties Jefferson