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Geologic formation in Texas, United States From Wikipedia, the free encyclopedia
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[1] have been among the fossils reported from the formation.[2][3] The boundary with the underlying Javelina Formation has been estimated at 66.5 million years old.[4] The formation preserves the rays Rhombodus and Dasyatis, as well as many gar scales.[5]
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 |
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