Trenton Group

Dark, crystalline, nodular, and argillaceous limestones, with some metabentonite streaks. Includes the Nealmont, Oranda, Edinburg, and the upper part of the Chambersburg Limestones of northeastern West Virginia; also the Moccasin and Eggleston Formation of Mercer and Monroe Counties.
State West Virginia
Name Trenton Group
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestonedark, crystalline, nodular, and argillaceous limestones
Incidental
Sedimentary > Clastic > Mudstone > Claystone > Bentonitesome metabentonite streaks
Comments Thickness: Northeastern 470-660 ft, Western 635 ft, Southeastern 450 ft
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.

NGMDB product
Counties Pendleton