Prehistoric mammals of Florida is the chronicling of the emergence and of prehistoric mammals in Florida.
Epoch:
Eocene—
Oligocene.
Time period: ~38—33.9
Ma.
Duration:
4.1 million years.
The
Chadronian (
NALMA) corresponds with
Priabonian through
Rupelian in geologic time. The Chadronian provides the first evidence of mammals in Florida. During the Reupellian, Florida began to emerge from the surrounding ocean and the layer known as
Suwannee Limestone formed. The
Gulf Trough had prevented land mammals from moving further south than mid-
Georgia. The sea mammal fossils of
Basilosaurus cetoides and
Zygorhiza, two toothed
whales found in
lithified
limestone southeast of [[[Marion County, Florida]] date from ~37.2—33.9 Ma.
[1] and appear to be the oldest mammal fossils found in Florida.
[2]
Epoch: Oligocene.
Time period: ~30.8—20.6 Ma.
Duaration: ~
10.2 million years
The
Arikareean age spanned the geological time periods of the
Rupelian through
Burdigalian. During the Rupelian, Florida fully connected with Georgia creating a
peninsula which provided access for land mammals to enter early Florida. During this period, the geological structure known as the
St. Marks Formation was created. Also during this period
Choctaw Sea and
Okeechobean Sea were created. The mid late Arikareean offers the first evidence of these land mammals with the earliest fossils dating to ~24.8 Ma. and found in
Hernando County, Florida.
[3]
Suwannee County, Florida paleontological sites
Epoch:
Miocene.
Time period: ~20.6—16.3 Ma.
Duration: ~
4.3 million years
The
Hemingfordian spanned the geological time periods of the
Burdigalian through
Langhian. During this time the
Chipola Subsea and
Torreya Formation of north Florida was created.
Squirrel: Miospermophilus, Nototamias hulberti, Petauristodon pattersoni
The
Barstovian age spanned the geological time periods of the
Langhian.
Epoch: Miocene.
Time period: ~16.3—13.6 Ma.
Duration: ~
2.7 million years.
Epoch: Miocene.
Time period: ~13.6—10.3 Ma.
Duration: ~
3.3 million years.
The
Clarendonian age spanned the geological time periods of the
Serravallian through
Tortonian. During this period the
Walton Subsea was created.
Alachua County. Sarasota, Hardee,
Epoch: Miocene—
Pliocene.
Time period: ~10.3—4.9 Ma.
Duration: ~
5.4 million years.
The
Hemphillian age spanned the geological time period of the
Tortonian. During this period the
Alaqua Subsea filled in northern Florida.
Bone Valley Formation,
Polk County, Florida paleontological sites,
Marion County, Florida paleontological sites Levy, Sarasota County
Epoch: Pliocene.
Time period: ~4.9—1.8 Ma.
Duration ~
3.1 million years
The
Blancan age spanned the geological time period of the
Blancan. During this period the
Jackson Subsea
Alachua, Charlotte, Gilchrist, Levy, Marion, Alachua, Charlotte, Citrus, Hillsborough, Indian River, Sumter, Brevard.
Epoch:
Pleistocene
Time period: ~1.8 Ma.—300,000 years ago.
Duration: ~
1.5 million years.
The
Irvingtonian age spanned the geological time period of the
Blancan.
Gilchrist, citrus, orange Citrus, Columbia, Gilchrist, Sarasota, Sumter County.
Epoch: Pleistocene.
Time period: ~300,000—11,000 years ago.
Duration: ~
0.289 million years
The
Rancholabrean age spanned the geological time period of the
Blancan.
Marion County. Sumter
http://en.wikipedia.org/wiki/Geologic_timescale#Table_of_geologic_time