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Marcellus Formation

Marcellus Formation - Black shale; sparse marine fauna and siderite concretions. Contains local limestone ("Purcell") member. Tioga bentonite included at base in eastern Pennsylvania.
StatePennsylvania
NameMarcellus Formation
Geologic ageDevonian
Original map labelDm
Primary rock typeblack shale
Secondary rock typelimestone
Other rock typesbentonite
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)black shale; sparse marine fauna and siderite concretions.
Minor
Sedimentary > Clastic > Mudstone > Claystone > Bentonite (Bed)Tioga bentonite included at base in eastern Pennsylvania.
Sedimentary > Carbonate > Limestone (Bed)contains local limestone ("Purcell") member.
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 coverageCarbon - Monroe - Pike - Schuylkill

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