Choptank Formation

Choptank Formation
Stratigraphic range:
Chesapecten nefrens, Choptank Formation
TypeFormation
Unit ofChesapeake Group
UnderliesSt. Marys Formation
OverliesCalvert Formation
Location
RegionVirginia, Maryland
CountryUnited States
Type section
Named forChoptank River

The Choptank Formation is a geologic formation in Virginia and Maryland. It preserves fossils dating from the mid-late Miocene of the Neogene period, from the latest Langhian to the early Tortonian (13.9 to 11 million years ago).

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