The Leon County paleontological sites are assemblages of Early Miocene invertebrates and vertebrates of Leon County, Florida, United States.
Age Era: Neogene. Period: Early Miocene. Faunal stage: Arikareean, ~23.1–21.9 Ma, calculates to a period of approximately . Geological Formation: Torreya Formation.
Sites Leon County paleontological sites are represented by the following: Griscom Plantation Site. Located in Killearn Lakes Plantation, south-southeast of Lake Iamonia on the southeast most section of Luna Plantation during a well drilling operation. Time period: ~23.6–18.8 Ma. (AEO).Alroy, John, AEO estimate. Coordinates: Seaboard Air Line Railroad Site. Location was south of the center of Tallahassee during a dredging operation for a roadway.Collected by: S. J. Olsen, R. Cantwell, C. Cox. S. J. Olsen. 1964. The stratigraphic importance of a Lower Miocene vertebrate fauna from north Florida. Journal of Paleontology 38(3):477–482. Time period: ~21.7 Ma. (AEO, Alroy). Coordinates: St. Marks River site. Located along the St. Marks River in southern Leon County. Time period: ~23.1–21.9 Ma. (AEO, Alroy).M. C. Coombs, R. M. Hunt, Jr., E. Stepleton, L. B. Albright, III, and T. J. Fremd. 2001. Stratigraphy, chronology, biogeography, and taxonomy of early Miocene small chalicotheres of North America. Journal of Vertebrate Paleontology 21(3):607–620 Coordinates: Tallahassee Waterworks Sites. Locations were just south of the center of Tallahassee. Time period: ~23.03–15.99 Ma. Coordinates: USGS 2302 USGS 3423 J.C. Henderson's well USGS 395 Griscom Plantation Site = GPS. Seaboard Air Line Railroad = SALR. St. Marks River site = SMRS. Tallahassee Waterworks Site = TWWS.
Specimens Invertebrates Anomia suwaneensis (bivalve) TWWS 3424 Chlamys (scallop) TWWS 2302 Ostrea normalis (oyster) SALR Lucina janus (bivalve) TWWS 2302 Mercenaria langdoni TWWS 395 Metis chipolana (bivalve) TWWS 2302 Turritella alcida (seal snail) TWWS 2302
Fish Carcharhinidae (requiem shark) SALR Myliobatidae (eagle ray) SALR Pristis (sawfish) SALR Sciaenidae (croaker) SALR
Reptiles Alligatoridae (alligator) SALR Boidae (boa or constricting snake) SALR Crocodylidae (crocodile) SALR Emydidae (pond turtle) SALR Testudinidae (land tortoise) SALR
Birds Gruidae (crane) SALR Ciconiidae (stork) SALR
Mammals Anchitherium clarencei (horse) SALR Aphelops (rhinoceros) SALR Archaeohippus blackbergi (horse) SALR Camelidae (family of camel) GPS Floridatragulus (camel) SALR Menoceras (rhinoceros) SALR Moropus SMRS Osbornodon iamonensis (proto-dog) GPS Oxydactylus (camel) Parahippus (horse) SALR Parahippus leonensis (horse) GPS, SALR Prosynthetoceras texanus (deer-like ungulate) SALR Nothokemas floridanus (camel) SALR Proheteromys floridanus (rodent) SALR Ruminantia (unknown ruminant) GPS
References
E. H. Sellards. 1916. Fossil vertebrates from Florida: A new Miocene fauna; new Pliocene species; the Pleistocene fauna. Florida State Geological Survey Annual Report 8:79–119. S. J. Olsen. 1964. The stratigraphic importance of a Lower Miocene vertebrate fauna from north Florida. Journal of Paleontology 38(3):477–482. Collected by S. J. Olsen, R. Cantwell, C. Cox. J. R. Gardner. 1947. The Molluscan Fauna of the Alum Bluff Group of Florida. United States Geological Survey Professional Paper (142A-H)1–709.