| Bacolet Formation | |
| Type: | Formation |
| Period: | Albian |
| Age: | Albian |
| Prilithology: | Mudstone |
| Otherlithology: | Volcaniclastic sandstone & siltstone |
| Namedfor: | Bacolet |
| Region: | Tobago |
| Country: |  Trinidad and Tobago |
| Coordinates: | 11.2°N -60.8°W |
| Paleocoordinates: | 5.6°N -32.6°W |
| Unitof: | Tobago Volcanic Group |
The Bacolet Formation is a geologic formation in Trinidad and Tobago. It preserves radiolaria and ammonite fossils dating back to the Albian period. The formation is part of the Tobago Volcanic Group and comprises organic-rich, black pyritic siliceous mudstones and fine-grained volcaniclastic sandstones and siltstones.[1]