Geologic formation in the United States
The Calvert Formation is a geologic formation in Maryland, Virginia, and Delaware. It preserves fossils dating back to the early to middle Miocene epoch of the Neogene period. It is one of the three formations which make up the Calvert Cliffs, all of which are part of the Chesapeake Group.
Fossils
The Calvert Formation is extremely fossiliferous. Some of the fossil species represented include the following:[1][2]
Sharks
Rays and other cartilaginous fish
Bony fish
Cetaceans
Pinnipeds
Crocodilians
Invertebrates
Terrestrial mammals
Birds
See also
References