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Mineral Resources On-Line Spatial Data

Harpers Formation

Harpers Formation (Chilhowee Group) - greenish-gray phyllite, with interbeds of fine-grained quartzite.
StateWest Virginia
NameHarpers Formation
Geologic ageCambrian
Original map labelCh
CommentsThickness: Northeastern 1200 ft, Southeastern - Chilhowee Group 1200 ft (estimate only).
Primary rock typephyllite
Secondary rock typequartzite
Other rock types
Lithologic constituents
Metamorphic > Metasedimentary > Metaclastic > Phyllitegreenish-gray phyllite
Metamorphic > Metasedimentary > Metaclastic > Quartzitewith interbeds of fine-grained quartzite.
Map references
Digital version of 1968 printed map available from with the specific data available from
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.

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