| Río Banano Formation | |
| Type: | Formation |
| Age: | Middle Miocene-Piacenzian |
| Period: | Messinian |
| Prilithology: | Sandstone, siltstone |
| Otherlithology: | Claystone |
| Namedfor: | Banano River |
| Region: | Limón Province |
| Coordinates: | 9.9°N -83.1°W |
| Paleocoordinates: | 9.8°N -83.3°W |
| Unitof: | Limón Group |
| Underlies: | Moin Formation |
| Overlies: | Uscari Formation |
The Río Banano Formation is a geologic formation in Costa Rica of the Limón Group. It preserves fossils dating back to the Middle Miocene to Piacenzian period.[1]