| Balumtun Sandstone | |
| Type: | Formation |
| Age: | Aquitanian ~ |
| Period: | Aquitanian |
| Prilithology: | Sandstone |
| Otherlithology: | Conglomerate |
| Namedfor: | Balumtun |
| Region: | Chiapas |
| Coordinates: | 17.1°N -92.7°W |
| Paleocoordinates: | 17.7°N -89°W |
| Unitof: | Río Concepción Group |
| Underlies: | Tulijá Formation |
| Overlies: | Mazantic Shale |
| Thickness: | 760 metres |
The Balumtun Sandstone is a geologic formation in Chiapas, Mexico. The formation is up to 760 metres thick, and consists of gray sandstone, that were deposited during the Upper Aquitanian stage of the Early Miocene.[1]