Mata Amarilla Formation

Mata Amarilla Formation
Stratigraphic range: Albian-Santonian
Type Geological Formation
Underlies Alta Vista Formation
Overlies Piedra Clavada Formation
Lithology
Primary Sandstone, shale
Other Mudstone, tuff
Location
Coordinates 49°30′S 71°30′W / 49.5°S 71.5°W / -49.5; -71.5Coordinates: 49°30′S 71°30′W / 49.5°S 71.5°W / -49.5; -71.5
Approximate paleocoordinates 56°30′S 48°48′W / 56.5°S 48.8°W / -56.5; -48.8
Region Santa Cruz Province
Country  Argentina
Extent Austral Basin

The Mata Amarilla formation is a stratigraphic division of Patagonia, Argentina, 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 and insects 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
Aonikenkissus A. zamunerae

References

  1. ↑ 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.
  2. ↑ 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.
  3. ↑ 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.
  4. ↑ Cerro Waring at Fossilworks.org

Further reading

  • J. F. Petrulevicius, A. N. Varela, A. Iglesias, A. B. Zamuner, and D. G. Poiré. 2014. First Cenomanian record of insects in the southern Hemisphere, with Perforissidae (Fulgoroidea) and Cupedidae (Coleoptera) from southern Patagonia, Argentina. Cretaceous Research 51:174-185
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