Choptank Formation
Choptank Formation Stratigraphic range: Miocene | |
---|---|
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[]
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[]
- Aglaocetus sp.
- Cetotheriumsp.
- Eurhinodelphis sp.
- Macrokentriodon morani
- Mesocetus
- Parietobalaena
- Orycterocetus
- Pelocetus
Pinnipeds[]
- Callophoca obscura
- Leptophoca proxima
Crocodilians[]
- Thecachampsa antiquus
- Thecachampsa sericodon
Invertebrates[]
Terrestrial Mammals[]
- Cynarctus wangi
- Gomphotherium calvertensis
- Hipparion cf. phosphorum
See also[]
- 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
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)
Categories:
- Neogene Maryland
- Neogene geology of Virginia
- Southern United States geologic formation stubs
- Virginia geography stubs