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Mineral Resources On-Line Spatial Data

Elbrook Formation

Elbrook Formation - Microcrystalline limestone and, in places, marble; includes subordinate dolomite containing abundant phyllitic layers; occurs in Chester and Montgomery Counties; relation to Elbrook of Cumberland Valley sequence is uncertain.
StatePennsylvania
NameElbrook Formation
Geologic ageCambrian
Original map labelCe
Primary rock typelimestone
Secondary rock typedolostone (dolomite)
Other rock typesphyllite; marble
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)microcrystalline limestone
Minor
Metamorphic > Metasedimentary > Metaclastic > Phyllite (Bed)subordinate dolomite containing abundant phyllitic layers
Sedimentary > Carbonate > Dolostone (Bed)subordinate dolomite containing abundant phyllitic layers
Incidental
Metamorphic > Metasedimentary > Metacarbonate > Marble (Bed)
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 coverageChester - Cumberland - Franklin - Montgomery

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