Choptank Formation
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:Sharks
- 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''
Rays and Other Cartilaginous Fish
- Aetobatus arcuatus
- Pteromyaleus sp.
- Dasyatis rugosa
- Dasyatis probsti
- ''Pinthicus stenodon''
Fish
- Acipenseridae indet.
- Opsanus sp.
- Serranidae indet
- 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.
- Cetotherium sp.
- Delphinodon sp.
- Eurhinodelphis sp.
- Macrokentriodon morani
- Mesocetus
- Parietobalaena
- Orycterocetus
- ''Pelocetus''
Pinnipeds
- Callophoca obscura
- Leptophoca proxima
- ''Prophoca sp.''
Crocodilians
- Thecachampsa antiquus
- ''Thecachampsa sericodon''
Invertebrates
- Chesapecten nefrens
- Chesacardium
- Euspira heros
- Mariacolpus octonnaria
- Macrocallista marylandica
- Stewartia anodonta
- Marvacrassitella marylandica
- Ecphora
- Panopea
- ''Albertella aberti''
Terrestrial Mammals
- Cynarctus wangi
- Gomphotherium calvertensis
- ''Hipparion cf. phosphorum''