| Adamantina Formation | |
|---|---|
| Stratigraphic range: Late Coniacian-Early Maastrichtian | |
| Type | Geological formation |
| Unit of | Bauru Group |
| Underlies | Uberaba Formation |
| Overlies | Santo Anastacio, Caiuá & Araçatuba Formations |
| Lithology | |
| Primary | Sandstone, calcrete |
| Other | Mudstone, siltstone, conglomerate, coal |
| Location | |
| Coordinates | 21°36′S 50°06′W / 21.6°S 50.1°W |
| Approximate paleocoordinates | 25°48′S 33°06′W / 25.8°S 33.1°W |
| Region |  São Paulo |
| Country |  Brazil |
| Extent | Bauru Basin, Paraná Basin |
| Type section | |
| Named for | Adamantina |
  Adamantina Formation (Brazil) | |
The Adamantina Formation is a geological formation in the Bauru Basin of western São Paulo state, in southeastern Brazil.
Its strata date back to the Late Cretaceous epoch of the Cretaceous Period, during the Mesozoic Era. The formation is part of the Bauru Group in the northeastern Paraná Basin.