Sobral Formation
| Sobral Formation | |
|---|---|
| Stratigraphic range: Danian 66 to 61.6 Ma | |
| Type | Geological formation |
| Unit of | Marambio Group |
| Underlies | Cross Valley Formation |
| Overlies | Lopez de Bertodano Formation |
| Lithology | |
| Primary | siltstone, mudstone |
| Other | concretion, sandstone |
| Location | |
| Region | Seymour Island, James Ross Island group |
| Country | Antarctica |
- For the part of the Portuguese Lourinhã Formation, see Sobral Unit.
The Sobral Formation is a palaeontological formation located in Antarctica. It dates to the Danian stage of the Lower Paleocene period.[1]
Spectacular fossils documenting marine and terrestrial ecosystems soon after the (non-avian) dinosaurs became extinct at the Cretaceous-Paleogene boundary are found in this formation.[2] One of the most significant sites is on Seymour Island.
See also
References
- ^ Bowman, V.; Ineson, J.; Riding, J.; Crame, J.; Francis, J.; Condon, D.; Whittle, R.; Ferraccioli, F. (2016). "The Paleocene of Antarctica: Dinoflagellate cyst biostratigraphy, chronostratigraphy and implications for the palaeo-Pacific margin of Gondwana". Gondwana Research. 38. doi:10.1016/j.gr.2015.10.018.
- ^ Crame, J.A.; Beu, A.G.; Ineson J.R.; Francis J.A.; Whittle R.J.; Bowman V.C. (2014). "The Early Origin of the Antarctic Marine Fauna and Its Evolutionary Implications". PLOS ONE. 7. doi:10.1371/journal.pone.0114743.
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