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La Meseta Formation
| La Meseta Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Seymour Island Group[1] |
| Underlies | Weddell Formation |
| Overlies | Lopez de Bertodano, Sobral & Cross Valley Formations |
| Thickness | 557 m (1,827 ft)[2] |
| Lithology | |
| Primary | Sandstone, claystone |
| Other | Siltstone, mudstone, conglomerate |
| Location | |
| Coordinates | 64°14′21.782″S 56°36′11.69″W / 64.23938389°S 56.6032472°W.[3] |
| Approximate paleocoordinates | 63°42′S 61°30′W / 63.7°S 61.5°W |
| Region | Seymour Island |
| Country | Antarctica |
 Geologic map of Seymour Island, Antarctica with La Meseta Formation in dark yellow | |
The La Meseta Formation is a sedimentary sequence deposited during much of the Paleogene on Seymour Island off the coast of the Antarctic Peninsula. It is noted for its fossils, which include both marine organisms and the only terrestrial vertebrate fossils from the Cenozoic of Antarctica.[2][4]
In some treatments, the La Meseta Formation is restricted to just the older Thanetian to Lutetian-aged strata, with the younger Bartonian to Rupelian strata treated as the overlying Submeseta Formation.[5][6] However, other papers instead treat the Submeseta Formation as an allomember of the La Meseta Formation.[7][8]
- ^ Zinsmeister, Jeffrey D. Stilwell ; William J. (1992). Molluscan systematics and biostratigraphy : Lower Tertiary La Meseta Formation, Seymour Island, Antarctic Peninsula. Washington, DC: American Geophysical Union. ISBN 978-0875907703.
{{cite book}}: CS1 maint: multiple names: authors list (link) - ^ a b Pezzetti, T.F.; KRISSEK, L.A (1986). "Re-evaluation of the Eocene La Meseta Formation of Seymour Island, Antarctic Peninsula". Antarctic Journal of the United States. 21 (5): 75.
- ^ Cite error: The named reference
Reguero 2012was invoked but never defined (see the help page). - ^ Vega, Greta C.; Olalla-Tárraga, Miguel Ángel (2020), "Past changes on fauna and flora distribution", Past Antarctica, Elsevier, pp. 165–179, doi:10.1016/b978-0-12-817925-3.00009-4, ISBN 978-0-12-817925-3, retrieved 2023-09-20
- ^ Acosta Hospitaleche, Carolina; Gelfo, Javier N. (2017-08-18). "Procellariiform remains and a new species from the latest Eocene of Antarctica". Historical Biology. 29 (6): 755–769. doi:10.1080/08912963.2016.1238470. hdl:11336/54885. ISSN 0891-2963.
- ^ Cite error: The named reference
:8was invoked but never defined (see the help page). - ^ Marenssi, Sergio A. (2006). "Eustatically controlled sedimentation recorded by Eocene strata of the James Ross Basin, Antarctica". Geological Society, London, Special Publications. 258 (1): 125–133. doi:10.1144/GSL.SP.2006.258.01.09.
- ^ Reguero, Marcelo Alfredo; Marenssi, Sergio Alfredo; Santillana, S. N. (2012). "Weddellian marine/coastal vertebrates diversity from a basal horizon (Ypresian, Eocene) of the Cucullaea I Allomember, La Meseta formation, Seymour (Marambio) Island, Antarctica". Revista Peruana de Biología. ISSN 1561-0837.
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