The Jefferson County, Florida paleontological sites are assemblages of Mid-Miocene

Miocene

The Miocene is a geological epoch of the Neogene Period and extends from about . The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words and and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene. The Miocene follows the Oligocene...

 to Late Pleistocene

Late Pleistocene

The Late Pleistocene is a stage of the Pleistocene Epoch. The beginning of the stage is defined by the base of the Eemian interglacial phase before the final glacial episode of the Pleistocene 126,000 ± 5,000 years ago. The end of the stage is defined exactly at 10,000 Carbon-14 years BP...

 vertebrates from Jefferson County, Florida

Jefferson County, Florida

Jefferson County is a county located in the U.S. state of Florida. As of 2000, the population is 12,902. The U.S. Census Bureau 2005 estimate for the county is 14,490 . Its county seat is Monticello, Florida....

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.

Age

Era: Neogene

Neogene

The Neogene is a geologic period and system in the International Commission on Stratigraphy Geologic Timescale starting 23.03 ± 0.05 million years ago and ending 2.588 million years ago...

Period: Miocene

Miocene

The Miocene is a geological epoch of the Neogene Period and extends from about . The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words and and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene. The Miocene follows the Oligocene...

 to Pleistocene

Pleistocene

The Pleistocene is the epoch from 2,588,000 to 11,700 years BP that spans the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....

, ~23.03 Mya—11,000 years ago. (calculates to a period of approximately ).

Faunal stage

Faunal stage

In chronostratigraphy, a stage is a succession of rock strata laid down in a single age on the geologic timescale, which usually represents millions of years of deposition. A given stage of rock and the corresponding age of time will by convention have the same name, and the same boundaries.Rock...

: Clarendonian

Clarendonian

The Clarendonian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology , typically set from 13,600,000 to 10,300,000 years BP, a period of . It is usually considered to overlap the Serravallian of the Middle...

 through early Rancholabrean

Rancholabrean

The Rancholabrean North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology , typically set from less than 240,000 years to 11,000 years BP, a period of . It is usually considered to overlap the Middle Pleistocene...

Sites

Ashville site (Miocene) Time period: ~13.5—12.7 Mya.

Aucilla River site (Pleistocene) Time period: ~126,000—11,000 years ago. The Aucilla site specimens were discovered by amateur paleontologist Dr. Richard Ohmes of Bremerton, Washington

Bremerton, Washington

Bremerton is a city in Kitsap County, Washington, United States. The population was 38,790 at the 2011 State Estimate, making it the largest city on the Olympic Peninsula. Bremerton is home to Puget Sound Naval Shipyard and the Bremerton Annex of Naval Base Kitsap...

 in 1969.

Coordinates: 30.1°N 83.9°W

Wacissa River site (Pleistocene) Time period: ~126,000—11,000 years ago. Collected by R. Alexon, B. Mathen, R. Gingery in October, 1981; in shallow water. Specimens reposited in the Florida Museum of Natural History

Florida Museum of Natural History

The Florida Museum of Natural History is the State of Florida's official state-sponsored and chartered natural history museum. Its main facilities are located on the campus of the University of Florida in Gainesville, Florida....

.

Coordinates: 30.4°N 83.9°W

Ashland site = ASH. Aucilla River

Aucilla River

The Aucilla River rises close to Thomasville, Georgia, USA, and passes through the Big Bend region of Florida, emptying into the Gulf of Mexico at Apalachee Bay. The river is long and has a drainage basin of . The Wacissa River is a tributary...

 site = ARS. Wacissa River

Wacissa River

The Wacissa River is a large, spring-fed stream located in south-central Jefferson County, Florida. Its headwaters are located about a mile south of the town of Wacissa, where the river emerges crystal clear from a group of large limestone springs...

 site = WRS.

Reptiles

• Emydidae
  Emydidae
  Emydidae, commonly called the pond turtles or marsh turtles, is a family of turtles. Previously, several species of Asian box turtle were classified in the family. However, revised taxonomy has separated them to a different family. Now, Emydidae, with the exception of two species of pond turtle,...
  
   (Turtle). WRS.
• Geochelone
  Geochelone
  Geochelone is a genus of tortoises.Geochelone tortoises, which are also known as typical tortoises or terrestrial turtles, can be found in Africa and Asia. They primarily eat plants.The genus consists of three extant species:...
  
   (Tortoise). ARS.
• Alligator
  Alligator
  An alligator is a crocodilian in the genus Alligator of the family Alligatoridae. There are two extant alligator species: the American alligator and the Chinese alligator ....
  
  . WRS.

Mammals

• Artiodactyla (Deer-like). ASH, ARS.
• Bison antiquus
  Bison antiquus
  Bison antiquus, sometimes called the ancient bison, was the most common large herbivore of the North American continent for over ten thousand years, and is a direct ancestor of the living American bison....
  
   (Bison). WRS.
• Calippus
  Calippus
  Calippus may refer to:* Calippus of Syracuse, a student of Plato and Syracusean tyrant.* Callippus, a Greek astronomer and mathematician.* Calippus , a small lunar crater.* Calippus, an extinct relation of the modern horse....
  
   proplacidus. ASH.
• Camelops
  Camelops
  Camelops is an extinct genus of camels that once roamed western North America, where it disappeared at the end of the Pleistocene about 10,000 years ago. Its name is derived from the Greek κάμελος + , thus "camel-face."-Background:...
  
   (Camel). ARS.
• Equus
  Equus (genus)
  Equus is a genus of animals in the family Equidae that includes horses, donkeys, and zebras. Within Equidae, Equus is the only extant genus. Like Equidae more broadly, Equus has numerous extinct species known only from fossils. This article deals primarily with the extant species.The term equine...
  
   (Horse). ARS, WRS.
• Hemiauchenia
  Hemiauchenia
  Hemiauchenia is a genus of lamine camelids that evolved in North America in the Miocene period approximately 10 million years ago. This genus diversified and moved to South America in the early Pleistocene as part of the Great American Interchange, giving rise to modern lamines...
  
   (Camel). WRS.
• Hippotherium
  Hippotherium
  Hippotherium is an extinct genus of horse endemic to North America, to Asia, Europe, and Africa during the Miocene through Pliocene ~13.65—3.3 Mya, existing for .- Taxonomy :...
  
   (Horse). ASH.
• Megalonyx
  Megalonyx
  Megalonyx is an extinct genus of giant ground sloths of the family Megalonychidae endemic to North America from the Hemphillian of the Late Miocene through to the Rancholabrean of the Pleistocene, living from ~10.3 Mya—11,000 years ago, existing for approximately .-Taxonomy:The generic name...
  
   (Ground sloth). ARS.
• Mammut (American Mastodon). ARS.
• Menoceratinae (Rhinocerous)
• Tapirus (Tapir). ARS.
• Odocoileus
  Odocoileus
  Odocoileus is a genus of medium-sized deer containing two species native to the Americas. The name is sometimes spelt odocoeleus; it is from a contraction of the roots odonto- and coelus meaning "hollow-tooth".-Species:...
  
   virginianus (Deer-like). WRS.
• Palaeolama
  Palaeolama
  Palaeolama is an extinct North and South American genus of lamine camelid.Palaeolama mirifica, the "stout-legged llama", is known from southern California and the southeastern U. S...
  
  (Llama). WRS.