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 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. 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 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 Neogene Maryland Neogene geology of Virginia