Lopez de Bertodano Formation
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Lopez de Bertodano Formation
| Lopez de Bertodano Formation Stratigraphic range: Maastrichtian 70 to 65 Ma |
|
|---|---|
| Type | Geological formation |
| Unit of | Marambio Group |
| Overlies | Snow Hill Island Formation |
| Lithology | |
| Primary | siltstone, mudstone |
| Other | concretion, sandstone |
| Location | |
| Region | James Ross Island group, Antarctica |
The Lopez de Bertodano Formation is a geological formation in the James Ross archipelago of the Antarctic Peninsula. The strata date to the end of the Late Cretaceous (upper-lower Maastrichtian stage[1]), about 70-65 million years ago. Dinosaur remains are among the fossils that have been recovered from the formation.[2]
| Dinosaurs of the Lopez de Bertodano Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Unit | Material | Notes | Images |
|
P. gregorii[2] |
Lower Sandwich Bluff Member |
Partial skull and skeleton, holotype |
A loon |
||
|
P.? sp. |
Lower Sandwich Bluff Member |
Partial skeleton including wing and hindlimbs |
Possibly a more primitive form with strong flight ability and lighter bones |
||
|
V. iaai[3] |
Lower Sandwich Bluff Member |
Partial skeleton, holotype |
An anseriform |
||
|
Unnamed species |
Cape Lamb Member |
Isolated femur |
Close relative of cariamids and phorusrhacids |
||
|
Undescribed charadriiform[5] |
Unnamed species |
Cape Lamb Member |
Partial skeleton |
||
|
Undescribed euornithopod[2] |
Unnamed species[2] |
||||
|
Undescribed hadrosaurid[1] |
Unnamed species |
Isolated tooth[1] |
|||
|
Unnamed species |
Fragments[1] |
||||
See also
References
- ^ a b c d e Olivero, E.B., Ponce, J.J., Marsicano, C.A. and Martinioni, D.R. (2007). "Depositional settings of the basal Lopez de Bertodano Formation, Maastrichtian, Antarctica." Revista de la Asociación Geológica Argentina, 62(4): 521-529.
- ^ a b c d e Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, Antarctica)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. p. 606. ISBN 0-520-24209-2.
- ^ Clarke, J.A., Tambussi, C.P., Noriega, J.I., Erickson, G.M. and Ketcham, R.A. (2005). "Definitive fossil evidence for the extant avian radiation in the Cretaceous." Nature, 433: 305-308. DOI:10.1038/nature03150 PDF fulltext Supporting information
- ^ Case, J., Reguero, M., Martin, J. and Cordes-Person, A. (2006). "A cursorial bird from the Maastrictian of Antarctica." Journal of Vertebrate Paleontology, 26(3): 48A.
- ^ Cordes, (2002). "A new charadriiform avian specimen from the Early Maastrichtian of Cape Lamb, Vega Island, Antarctic Peninsula". Journal of Vertebrate Paleontology, 22(3): 46A.
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