Mata Amarilla Formation
| Mata Amarilla Formation | |
|---|---|
| Type | Geological Formation |
| Underlies | La Anita Formation |
| Overlies | Pieda Clavada Formation |
The Mata Amarilla formation is a stratigraphic division consisting of rocks deposited between the Albian and Santonian ages. The middle section was previously considered to be the Pari Aike Formation.
Age
The middle section of the Mata Amarilla Formation has widely been regarded as Maastrichtian in age, but recent dating of a lava tuff layer shows that it dates back to 96.2 ± 0.7 Ma, during the Cenomanian.[1]
Paleobiota
| Dinosaurs reported from the Mata Amarilla Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Austrocheirus[2] | A. isasii | Middle Section | An indeterminate theropod.[3] | |||
| Loncosaurus | L. argentinus | Middle Section | ||||
| Orkoraptor | O. burkei | Middle Section | ||||
| Puertasaurus | P. reuili | Middle Section | ||||
| Talenkauen | T. santacrucensis | Middle Section | ||||
References
- ↑ Varela, A. N.; Poiré, D. G.; Martin, T.; Gerdes, A.; Goin, F. J.; Gelfo, J. N.; Hoffmann, S. (2012). "U-Pb zircon constraints on the age of the Cretaceous Mata Amarilla Formation, Southern Patagonia, Argentina: Its relationship with the evolution of the Austral Basin". Andean Geology. 39 (3): 359–379. doi:10.5027/andgeoV39n3-a01.
- ↑ Ezcurra, M.D., Agnolin, F.L. & Novas, F.E. (2010). "An abelisauroid dinosaur with a non-atrophied manus from the Late Cretaceous Pari Aike Formation of southern Patagonia" (PDF). Zootaxa. 2450: 1–25.
- ↑ Rauhut, O. W. M. (2012). "A reappraisal of a putative record of abelisauroid theropod dinosaur from the Middle Jurassic of England". Proceedings of the Geologists' Association. 123 (5): 779–786. doi:10.1016/j.pgeola.2012.05.008.
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