Cumberland Head Formation

Interbedded graded bioclastic limestone, bluish-gray calcareous shale, and laminated shale. Rocks of the Laurentian Margin. Part of the Adirondack lowlands and Lake Champlain lowlands (west of the Orwell and Champlain thrusts).
State Vermont
Name Cumberland Head Formation
Geologic age Upper Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)Interbedded graded bioclastic limestone.
Sedimentary > Clastic > Mudstone > Shale (Calcareous)Bluish-gray calcareous shale, and laminated shale.
References
NGMDB product
Counties Addison - Chittenden - Franklin - Grand Isle