| 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.
The Choptank Formation is extremely fossiliferous. Some of the fossil species represented include the following: [1] [2]
- Otodus megalodon
- Carcharodon hastalis
- Isurus oxyrhincus
- Carcharomodus escheri
- Physogaleus contortus
- Galeocerdo aduncus
- Carcharhinus
- Hemipristis serra
- Squatina sp.
- Notorhyncus cepedianus
- Carcharias
- Isurus retroflexus
- Parotodus benedeni
- Alopias vulpinus
- Alopias grandis
- Cetorhinus
- Negaprion brevirostris
- Rhizoprionodon
- Sphryna laevissima
- Aetobatus arcuatus
- Pteromyaleus sp.
- Dasyatis rugosa
- Dasyatis probsti
- Pinthicus stenodon
- 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
- Aglaocetus sp.
- Cetotherium sp.
- Delphinodon sp.
- Eurhinodelphis sp.
- Macrokentriodon morani
- Mesocetus
- Parietobalaena
- Orycterocetus
- Pelocetus
- Callophoca obscura
- Leptophoca proxima
- Prophoca sp.
- Thecachampsa antiquus
- Thecachampsa sericodon
- Chesapecten nefrens
- Chesacardium
- Euspira heros
- Mariacolpus octonnaria
- Macrocallista marylandica
- Stewartia anodonta
- Marvacrassitella marylandica
- Ecphora
- Panopea
- Albertella aberti
- Cynarctus wangi
- Gomphotherium calvertensis
- Hipparion cf. phosphorum
- List of fossiliferous stratigraphic units in Virginia
- Paleontology in Virginia
- Paleontology in Maryland
- Calvert Cliffs State Park
- List of fossiliferous stratigraphic units in Maryland
- Chesapeake Group
- ^ 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.
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