| Mercedes Formation | |
|---|---|
| Stratigraphic range: Campanian-Maastrichtian ~ | |
| Type | Geological formation |
| Underlies | Asencio Formation |
| Overlies | Guichón Formation |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Coordinates | 33°24′S 58°18′W / 33.4°S 58.3°W |
| Approximate paleocoordinates | 37°18′S 41°24′W / 37.3°S 41.4°W |
| Region | Río Negro & Soriano Departments |
| Country |  Uruguay |
| Extent | Norte Basin |
| Type section | |
| Named for | Mercedes, Uruguay |
  Mercedes Formation, Uruguay (Uruguay) | |
The Mercedes Formation is a Late Cretaceous (Campanian to Maastrichtian) geologic formation of the Norte Basin in Uruguay. Fossil dinosaur eggs have been reported from the formation.[1] The formation that reaches a thickness of about 100 metres (330 ft),[2] overlies the Guichón Formation and is overlain by the Asencio Formation.[3]