Quiriquina Formation
| Quiriquina Formation | |
|---|---|
| Stratigraphic range: Late Maastrichtian | |
| Type | Geological formation |
| Unit of | Arauco Group |
| Underlies | Lebu Group |
| Overlies | Granitic rocks |
| Lithology | |
| Primary | Sandstone |
| Other | Conglomerate |
| Location | |
| Coordinates | 33°30′S 71°42′W / 33.5°S 71.7°W |
| Approximate paleocoordinates | 35°36′S 59°12′W / 35.6°S 59.2°W |
| Region | Bío Bío, Concepción & Valparaíso Regions |
| Country | Chile |
| Extent | Arauco Basin |
| Type section | |
| Named for | Quiriquina Island |
| Named by | Biró-Bagóczky |
| Year defined | 1982 |
The Quiriquina Formation is a geological formation in Chile whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. The glauconitic sandstones and conglomerates of the formation were deposited in a marine environment.