Açu Formation
| Açu Formation | |
|---|---|
| Stratigraphic range: Albian ~ | |
| Type | Geological formation |
| Unit of | Apodi Group |
| Underlies | Jandaíra Formation |
| Overlies | Alagamar Formation |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Coordinates | 5°48′S 38°06′W / 5.8°S 38.1°W |
| Approximate paleocoordinates | 11°54′S 10°54′W / 11.9°S 10.9°W |
| Region | Ceará |
| Country | Brazil |
| Extent | Potiguar Basin |
The Açu Formation is an Early Cretaceous (Albian) geologic formation of the Potiguar Basin in Ceará, northeastern Brazil. The formation comprises coarse-grained sandstones deposited in a fluvio-deltaic environment. The Açu Formation, belonging to the Apodi Group, has provided fossils of an indeterminate rebbachisaurid.