Middle and Upper Devonian, undivided (WVDmu;0)

Middle and Upper Devonian, undivided - this unit is predominantly shale, and includes all Devonian beds above the Onesquethaw. Consists of units: Hampshire Formation, Chemung Group, Brallier Formation, Harrell Shale, Mahantango Formation, and Marcellus Formation.

State	West Virginia
Name	Middle and Upper Devonian, undivided
Geologic age	Devonian
Original map label	Dmu
Comments	Consists of units: Hampshire Formation, Chemung Group, Brallier Formation, Harrell Shale, Mahantango Formation, and Marcellus Formation. Combined thickness: Northeastern 5345-10900 ft, Western 3245 ft, Southeastern 1050-4100 ft.
Primary rock type	shale
Secondary rock type
Other rock types
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > 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 [http://wvgis.wvu.edu/data/data.php] [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.
Geographic coverage	Mercer