| Quiriquina Formation | |
| Type: | Geological formation |
| Period: | Maastrichtian |
| Age: | Late Maastrichtian |
| Prilithology: | Sandstone |
| Otherlithology: | Conglomerate |
| Namedfor: | Quiriquina Island |
| Namedby: | Biró-Bagóczky |
| Year Ts: | 1982 |
| Region: | Bío Bío, Concepción & Valparaíso Regions |
| Coordinates: | -33.5°N -71.7°W |
| Paleocoordinates: | -35.6°N -59.2°W |
| Unitof: | Arauco Group |
| Underlies: | Lebu Group |
| Overlies: | Granitic rocks |
| Extent: | Arauco Basin |
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.[1] The glauconitic sandstones and conglomerates of the formation were deposited in a marine environment.[2]