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Harpers Formation

Harpers Formation - Dark-greenish-gray phyllite and schist containing thin quartzite layers.
StatePennsylvania
NameHarpers Formation
Geologic ageCambrian
Original map labelCh
Primary rock typephyllite
Secondary rock typeschist
Other rock typesquartzite
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Metamorphic > Schist
Minor
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Map references
Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map. Retrieved from internet 9-30-2004; <http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx> DL Data: pageoexp.zip
Unit references
Berg, T. M., Edmunds, W. E., Geyer, A. R., and others, compilers, 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey, 4th ser., Map 1, 2nd ed., 3 sheets, scale 1:250,000.
Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map. Retrieved from internet 9-30-2004; <http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx> DL Data: pageoexp.zip
Geographic coverageAdams - Chester - Cumberland - Franklin - Lancaster - York

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=PACAh;22
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