Hornitos Formation
| Hornitos Formation | |
|---|---|
| Stratigraphic range: Late Cretaceous, | |
| Type | Geological formation |
| Lithology | |
| Primary | Limestone, sandstone, conglomerate |
| Other | Marl, tuff |
| Location | |
| Coordinates | 28°00′S 70°18′W / 28.0°S 70.3°W |
| Approximate paleocoordinates | 30°36′S 54°30′W / 30.6°S 54.5°W |
| Region | Atacama |
| Country | Chile |
| Extent | Algarrobal Basin |
The Hornitos Formation is a Campanian geologic formation of the Algarrobal Basin in the Atacama Region of northern Chile. The formation comprises limestones, sandstones, conglomerates, marls and tuff. Dinosaur remains are among the fossils that have been recovered from the formation, including the sauropod Arackar licanantay.