Snow Hill Island Formation
The Snow Hill Island Formation is a Late Campanian geologic formation found on James Ross Island, James Ross Island group, Antarctica. Remains of a paravian theropod Imperobator antarcticus[2] have been recovered from it, as well as the elasmarian ornithopods Trinisaura santamartaensis and Morrosaurus antarcticus, the nodosaurid Antarctopelta oliveroi, and the shark Notidanodon sp. Alongside these described genera are also the remains of indeterminate elasmosaurids,[3] lithostrotian titanosaurs and an indeterminate pterosaur.
| Snow Hill Island Formation Stratigraphic range: Late Campanian [1] | |
|---|---|
| Type | Geological formation |
| Unit of | Marambio Group |
| Sub-units | Gamma & Herbert Sound Members |
| Underlies | Lopez de Bertodano Formation |
| Overlies | Santa Marta Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Mudstone |
| Location | |
| Coordinates | 63.9°S 57.9°W |
| Approximate paleocoordinates | 61.8°S 68.5°W |
| Region | James Ross Island, James Ross Island group |
| Country | Antarctica |
 Geologic map of Seymour Island, Antarctica with Snow Hill Island Formation in dark green | |
In the Herbert Sound Member of the Snow Hill Island Formation, bivalves, ammonites, and fish were found.[4]
See also
- List of fossiliferous stratigraphic units in Antarctica
- List of dinosaur-bearing rock formations
- Sobral Formation
- South Polar region of the Cretaceous
References
- Pirrie et al., 1997
- Ely & Case, 2019
- O'Gorman, 2012, p.2
- O'Gorman, 2012, p.3
Bibliography
- Ely, Ricardo C., and Judd A. Case. 2019. Phylogeny of a new gigantic paravian (Theropoda; Coelurosauria; Maniraptora) from the Upper Cretaceous of James Ross Island, Antarctica. Cretaceous Research 101. 1–16. doi:10.1016/j.cretres.2019.04.003
- O'Gorman, J.P. 2012. The oldest elasmosaurs (Sauropterygia, Plesiosauria) from Antarctica, Santa Marta Formation (upper Coniacian? Santonian-?upper Campanian) and Snow Hill Island Formation (upper Campanian-?lower Maastrichtian), James Ross Island. Polar Research 31. 1–10. Accessed 2019-04-13. doi:10.3402/polar.v31i0.11090
- Pirrie, D.; J.A. Crame; S.A. Lomas, and J.B. Riding. 1997. Late Cretaceous stratigraphy of the Admiralty Sound region, James Ross Basin, Antarctica. Cretaceous Research 18. 109–137. doi:10.1006/cres.1996.0052
Further reading
- D. Néraudeau, A. Crame, and M. Kooser. 2000. Upper Cretaceous echinoids from James Ross Basin, Antarctica. Géobios 33(4):455-466 doi:10.1016/S0016-6995(00)80079-0
- R. A. Otero, S. Soto-Acuna, A. O. Vargas, D. Rubilar Rogers, R. E. Yury Yanez and C. S. Gutstein. 2013. Additions to the diversity of elasmosaurid plesiosaurs from the Upper Cretaceous of Antarctica. Gondwana Research doi:10.1016/j.gr.2013.07.016
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.