Choptank Formation

Choptank Formation
Stratigraphic range: Miocene
Choptank Formation; Stratigraphic range: Miocene
	Chesapecten nefrens, Choptank Formation
Type	Formation
Unit of	Chesapeake Group
Underlies	St. Marys Formation
Overlies	Calvert Formation
Location
Region	Virginia, Maryland
Country	United States
Type section
Named for	Choptank River

The Choptank Formation is a geologic formation in Virginia and Maryland. It preserves fossils dating from the Miocene epoch of the Neogene period.

Fossils[]

The Choptank Formation is extremely fossiliferous. Some of the fossil species represented include the following:^[1]^[2]

Sharks[]

Carcharocles megalodon
Carcharodon hastalis
Isurus oxyrhincus
Carcharomodus escheri
Physogaleus contortus
Galeocerdo aduncus
Carcharhinus
Hemipristis serra
Squatinasp.
Notorhyncus cepedianus
Carcharias
Isurus retroflexus
Parotodus benedeni
Alopias vulpinus
Alopias grandis
Cetorhinus
Negaprion brevirostris
Rhizoprionodon
Sphryna laevissima

Rays and Other Cartilaginous Fish[]

Aetobatus arcuatus
sp.
Dasyatis rugosa
Dasyatis probsti

Fish[]

Acipenseridae indet.
Opsanus sp.
Serranidae sp.
Pogonias sp.
Sciaenops sp.
Tautoga sp.
Acanthocybium cf. solandri
Thunnus sp.
Istiophorus cf. platypterus
Mola cf. pileata
Ariopsis aff. A. felis
Trisopterus sculptus
Micromesistius cognatus
Prionotus

Cetaceans[]

Pinnipeds[]

Callophoca obscura
Leptophoca proxima

Crocodilians[]

Thecachampsa antiquus
Thecachampsa sericodon

Invertebrates[]

^[3]

Terrestrial Mammals[]

Cynarctus wangi
Gomphotherium calvertensis
Hipparion cf. phosphorum

References[]

^ Godfrey, Stephen J., ed. (2018-09-25). "The Geology and Vertebrate Paleontology of Calvert Cliffs, Maryland, USA". Smithsonian Contributions to Paleobiology (100): 2–274. doi:10.5479/si.1943-6688.100. ISSN 1943-6688.
^ "Paleobiology Collections Search". collections.nmnh.si.edu. Retrieved 2020-08-14.
^ "Collections". The Fossil Forum. Retrieved 2020-08-14.

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021. {{cite web}}: |author= has generic name (help)

This article about a specific stratigraphic formation in Virginia is a stub. You can help Wikipedia by .

[1] Godfrey, Stephen J., ed. (2018-09-25). "The Geology and Vertebrate Paleontology of Calvert Cliffs, Maryland, USA". Smithsonian Contributions to Paleobiology (100): 2–274. doi:10.5479/si.1943-6688.100. ISSN 1943-6688.

[2] "Paleobiology Collections Search". collections.nmnh.si.edu. Retrieved 2020-08-14.

[3] "Collections". The Fossil Forum. Retrieved 2020-08-14.

[1]

[2]

[3]