| Alachua Formation | |
|---|---|
| Stratigraphic range: Early-Late Miocene (Hemingfordian-Hemphillian) ~ | |
| Type | Formation |
| Lithology | |
| Primary | Claystone, sandstone |
| Other | Phosphorite |
| Location | |
| Coordinates | 29°42′N 82°36′W / 29.7°N 82.6°W |
| Approximate paleocoordinates | 29°48′N 80°54′W / 29.8°N 80.9°W |
| Region | Florida |
| Country |  United States |
| Type section | |
| Named for | Alachua, Florida |
  Alachua Formation (the United States)  Alachua Formation (Florida) | |
The Alachua Formation is a Miocene geologic formation in Florida. The claystones, sandstones and phosphorites of the formation preserve many fossils of mammals, birds, reptiles and fish, among others megalodon.