Javelina Formation
The Javelina Formation is a geological formation in Texas. Dating has shown that the strata date to the Maastrichtian stage of the Late Cretaceous, approximately 70 to 66.5 million years old. The middle part of the formation has been dated to about 69 million years ago plus or minus 1 million years and the top situated near the Cretaceous–Paleogene boundary (in the overlying Black Peaks Formation), dated to 66 Ma ago. Dinosaur remains are among the fossils that have been recovered from the formation.
| Javelina Formation | |
|---|---|
| Stratigraphic range: Maastrichtian, | |
Distinctive mauve and red beds of the Javelina Formation outcropping in Big Bend National Park, Texas | |
| Type | Geological formation |
| Unit of | Tornillo Group |
| Underlies | Black Peaks Formation |
| Overlies | Aguja Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Claystone, mudstone, siltstone, conglomerate |
| Location | |
| Coordinates | 29.3°N 103.4°W |
| Approximate paleocoordinates | 36.0°N 82.8°W |
| Region | Texas |
| Country | USA |
| Type section | |
| Named for | Javelina |
Javelina Formation (the United States) Javelina Formation (Texas) | |
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