Calvert Formation

{{Short description|Geologic formation in the United States}}

{{Infobox rockunit

|name=Calvert Formation

|image=2016-07-20 10 17 03 Cliffs to the south of Grays Creek in Calvert Cliffs State Park, Calvert County, Maryland.jpg

|caption=Outcrops of the Calvert Formation at the Calvert Cliffs State Park

|country=United States

|map=

|area=

|extent=

|thickness=

|overlies=Old Church Formation

|underlies=Choptank Formation

|subunits=

|unitof=Chesapeake Group

|coordinates=

|region=Maryland, Virginia, Delaware

|namedby=|namedfor=Calvert County

|otherlithology=

|prilithology=

|period=Neogene

|age=Miocene

|type=Formation

|map_caption=}}

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

File:Meg_in_gravel.jpg

File:Calvert Zone 10 Calvert Co MD 2.jpg

The Calvert Formation is extremely fossiliferous. Some of the fossil species represented include the following:{{Cite journal|date=2018-09-25|editor-last=Godfrey|editor-first=Stephen J.|title=The Geology and Vertebrate Paleontology of Calvert Cliffs, Maryland, USA|journal=Smithsonian Contributions to Paleobiology|issue=100|pages=2–274|doi=10.5479/si.1943-6688.100|issn=1943-6688|doi-access=free}}{{Cite web|title=Paleobiology Collections Search|url=https://collections.nmnh.si.edu/search/paleo/|access-date=2020-08-14|website=collections.nmnh.si.edu}}

= Sharks =

= Rays and other cartilaginous fish =

= Bony fish =

= Cetaceans =

= Pinnipeds =

= Crocodilians =

= Invertebrates =

= Terrestrial mammals =

= Birds =

See also

References