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Marcellus Formation

Marcellus Formation (part of Millboro Shale) - predominantly gray-black to black thinly laminated non-calcareous pyritic shale. Contains one or more thin-bedded limestones, including the Purcell Member of Pennsylvania.
State West Virginia
Name Marcellus Formation
Geologic age Devonian
Comments Thickness: Northeastern 200-880 ft, Western 170 ft, Southeastern 100-300 ft
Primary rock type black shale
Secondary rock type limestone
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shalepredominantly gray-black to black thinly laminated non-calcareous pyritic shale
Incidental
Sedimentary > Carbonate > Limestone (Bed)Contains one or more thin-bedded limestones, including the Purcell Member of Pennsylvania.
Sedimentary > Clastic > Mudstone > Shalepredominantly gray-black to black thinly laminated non-calcareous pyritic shale
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 Monroe