| Aguja Formation | |
|---|---|
| Stratigraphic range: Lower to Middle Campanian ~ | |
 Outcrops of the Aguja Formation, Big Bend National Park, Texas | |
| Type | Geological formation |
| Unit of | Tornillo Group |
| Sub-units | La Basa Sandstone Member, Rattlesnake Mountain Sandstone Member, Terlingua Creek Sandstone Member, Abajo Shale Member, and Alto Shale Member |
| Underlies | Javelina Formation |
| Overlies | Pen Formation |
| Lithology | |
| Primary | Sandstone, conglomerate, claystone |
| Other | Mudstone, shale, limestone |
| Location | |
| Coordinates | 29°18′N 103°30′W / 29.3°N 103.5°W |
| Approximate paleocoordinates | 35°48′N 77°00′W / 35.8°N 77.0°W |
| Region |  Texas Chihuahua Coahuila |
| Country |  USA Mexico |
  Aguja Formation (the United States)  Aguja Formation (Texas) | |
The Aguja Formation is a geological formation in North America, exposed in Texas, United States and Chihuahua and Coahuila in Mexico, whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.[1] Fossil palms have also been unearthed here.[2]
- ^ Weishampel et al., 2004, "Dinosaur distribution (Late Cretaceous, North America).", pp.574-588
- ^ Manchester, Steven R.; Lehman, Thomas M.; Wheeler, Elisabeth A. (July 2010). "Fossil Palms (Arecaceae, Coryphoideae) Associated with Juvenile Herbivorous Dinosaurs in the Upper Cretaceous Aguja Formation, Big Bend National Park, Texas". International Journal of Plant Sciences. 171 (6): 679–689. doi:10.1086/653688. ISSN 1058-5893. S2CID 84762968.