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 1.2 million years.
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).^[1]

Coordinates: 30°33′56″N 84°12′58″W / 30.5655°N 84.2162°W / 30.5655; -84.2162

• Seaboard Air Line Railroad Site. Location was south of the center of Tallahassee during a dredging operation for a roadway.^[2] Time period: ~21.7 Ma. (AEO, Alroy).

Coordinates: 30°18′N 84°12′W / 30.3°N 84.2°W / 30.3; -84.2

• St. Marks River site. Located along the St. Marks River in southern Leon County. Time period: ~23.1–21.9 Ma. (AEO, Alroy).^[3]

Coordinates: 30°18′N 84°12′W / 30.3°N 84.2°W / 30.3; -84.2

• Tallahassee Waterworks Sites. Locations were just south of the center of Tallahassee. Time period: ~23.03–15.99 Ma.

Coordinates: 30°24′N 84°18′W / 30.4°N 84.3°W / 30.4; -84.3

• • USGS 2302
  • USGS 3423 aka 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