Black Peaks Formation
The Black Peaks Formation is a geological formation in Texas whose strata date back to the Late Cretaceous. Dinosaur remains (from the sauropod Alamosaurus) and the pterosaur Quetzalcoatlus northropi have been among the fossils reported from the formation. The boundary with the underlying Javelina Formation has been estimated at about 66.5 million years old. The formation preserves the rays Rhombodus and Dasyatis, as well as many gar scales.
| Black Peaks Formation | |
|---|---|
| Stratigraphic range: Maastrichtian-Danian (Tiffanian) ~ | |
| Type | Geological formation |
| Unit of | Tornillo Group |
| Overlies | Javelina Formation |
| Lithology | |
| Primary | Mudstone |
| Other | Limestone |
| Location | |
| Coordinates | 29.3°N 103.4°W |
| Approximate paleocoordinates | 36.0°N 82.8°W |
| Region | Texas |
| Country | USA |
Black Peaks Formation (the United States) Black Peaks Formation (Texas) | |
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