Chazy, Black River, and Trenton Limestones - undifferentiated

See individual formation descriptions. Shown locally west of the Taconic allochthon. Vermont Valley sequence and Middlebury synclinorium (above the Orwell and Champlain thrusts).
State Vermont
Name Chazy, Black River, and Trenton Limestones - undifferentiated
Geologic age Upper and Middle Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Clastic > Sandstone (Bed, Calcareous)
Sedimentary > Carbonate > Limestone (Bed)
Incidental
Sedimentary > Chemical > Chert (Bed)
References
NGMDB product