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La Meseta Formation information


La Meseta Formation
Stratigraphic range: Eocene
PreꞒ
O
S
D
C
P
T
J
K
Pg
N
TypeGeological formation
Unit ofSeymour Island Group[1]
UnderliesWeddell Formation
OverliesLopez de Bertodano, Sobral & Cross Valley Formations
Thickness557 m (1,827 ft)[2]
Lithology
PrimarySandstone, claystone
OtherSiltstone, mudstone, conglomerate
Location
Coordinates64°14′21.782″S 56°36′11.69″W / 64.23938389°S 56.6032472°W / -64.23938389; -56.6032472.[3]
Approximate paleocoordinates63°42′S 61°30′W / 63.7°S 61.5°W / -63.7; -61.5
RegionSeymour Island
CountryAntarctica

Geologic map of Seymour Island, Antarctica with La Meseta Formation in dark yellow

The La Meseta Formation is a sedimentary sequence deposited during the Eocene 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]

  1. ^ 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)
  2. ^ a b Pezzetti, T.F.; KRISSEK, L.A (1986). "Re-evaluation of the Eocene La Meseta Formation of Seymour Island, AntarcticPeninsula": 75. {{cite journal}}: Cite journal requires |journal= (help)
  3. ^ Cite error: The named reference Reguero 2012 was invoked but never defined (see the help page).
  4. ^ 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

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La Meseta Formation

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The La Meseta Formation is a sedimentary sequence deposited during the Eocene on Seymour Island off the coast of the Antarctic Peninsula. It is noted...

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(Australobalanidae) colonizing a log of Podacarpoxylon from the La Meseta Formation (Eocene), Seymour Island, Antarctica: a glimpse on Antarctic antiquity"...

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fossil bones from Middle or Late Eocene strata (34-50 MYA) of the La Meseta Formation on Seymour Island, Antarctica. Initially, it was described as a separate...

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Gondwanatheria that lived in Patagonia, Argentina (Salamanca Formation) and Antarctica (La Meseta Formation) from the Middle Paleocene (Peligran), just after the...

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Reguero MA, Vizcaíno SF (1994). "Ratite bird from the Paleogene La Meseta Formation, Seymour Island, Antarctica" (PDF). Polish Polar Research. 15 (1–2):...

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that closely resemble those of the porbeagle have been found in the La Meseta Formation on Seymour Island off the Antarctic Peninsula, which date to the...

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around 100 kg) phorusrhacid or phorusrhacid-like bird from the Eocene La Meseta Formation (Seymour Island, Antarctica), interpreted by the authors as likely...

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have now been recovered from the Late Eocene (34-37 MYA) of the La Meseta Formation on Seymour Island, Antarctica (Tambussi et al., 2006), but given...

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remains found in Middle or Late Eocene strata (34 to 50 MYA) of the La Meseta Formation on Seymour Island, Antarctica. P. antarcticus, the first fossil penguin...

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Metatheria

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The only known Antarctic metatherians are from the Early Eocene La Meseta Formation of the Antarctic Peninsula, where they are the most diverse group...

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Araucaria

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Tiaojishan Formation, China (Middle Jurassic) †Araucaria fibrosa – López de Bertodano Formation, Antarctica (Late Cretaceous) †Araucaria marensii – La Meseta Formation...

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Archaeospheniscus wimani

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remains were found in Middle or Late Eocene strata (34-50 MYA) of the La Meseta Formation on Seymour Island, Antarctica. It is known from a fair number of...

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represented by two fossil shell fragments from the Early Eocene La Meseta Formation from Seymour Island, Antarctica. These are straight shells that closely...

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Eocene La Meseta Formation, Antarctica London Clay, Selsey and Elmore Formations, England Yazoo Formation, Louisiana Moodys Branch Formation, Mississippi...

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in: Eocene Aridal Formation (Bartonian), Morocco La Meseta Formation, Seymour Island, Antarctica Oligocene Chandler Bridge Formation, South Carolina Miocene...

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Meridiolestida

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meridiolestidan is known from a tooth fragment, now lost, found in the La Meseta Formation from the Eocene of the Antarctic Peninsula. The latest surviving...

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Archaeospheniscus

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penguin), was found in Middle or Late Eocene strata (34-50 MYA) of the La Meseta Formation on Seymour Island, Antarctica, whereas the other two, about the size...

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an isolated right p4 or m1, was found in the Telm 5 Member of the La Meseta Formation in West Antarctica. It was first named by Mariano Bond, Alejandro...

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Great American Interchange

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M. (2011). "A new astrapothere (Mammalia, Meridiungulata) from La Meseta Formation, Seymour (Marambio) Island, and a reassessment of previous records...

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Ratite

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Reguero, M.A.; Vizcaino, S.F. (1994). "Ratite bird from the Paleogene La Meseta Formation, Seymour Island, Antarctica" (PDF). Polish Polar Research. 15 (1–2):...

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Llanocetus

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endocast of the braincase, referred to the same specimen, from the La Meseta Formation of Seymour Island, Antarctica. They were excavated in 1974–75 by...

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isolated teeth, have also been recovered from the Middle Eocene La Meseta Formation of Seymour Island, Western Antarctica. Finally, several undescribed...

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Litopterna

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America, sparnotheriodontids are also known from the Eocene aged La Meseta Formation in the Antarctic Peninsula, representing the only record of litopterns...

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Nuphar

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water lily, known as Notonuphar, were identified in the Eocene-aged La Meseta Formation of Seymour Island, Antarctica. The seed anatomy of Notonuphar closely...

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