La Meseta Seymour Island, Unit III: Priabonian, Antarctica
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Cetacea
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Dorudontinae indet.
(Miller 1923)
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Borsuk-Bialynicka 1988 | |||||||||
= Cetacea indet.
Brisson 1762
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Uhen 2500 | |||||||||
Mammalia
- Cetacea
- Basilosauridae
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Zygorhiza sp.
True 1908
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Cozzuol 1988 | 1 specimen | ||||||||
It is not clear e | ||||||||||
= Basilosauridae indet.
Cope 1867
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Uhen 2013 | |||||||||
Basilosauridae indet.
Cope 1867
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Cozzuol 1988 | |||||||||
Mammalia
- Cetacea
- Llanocetidae
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? Zeuglodon sp.
Owen 1839
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1 specimen | |||||||||
= Llanocetus denticrenatus n. gen., n. sp.
Mitchell 1989
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Mitchell 1989 | |||||||||
Reptilia
- Sphenisciformes
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Sphenisciformes indet.
Sharpe 1891
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Mitchell 1989 | |||||||||
see common names |
Geography
Country: | Antarctica |
Coordinates: | 64.2° South, 56.6° West (view map) |
Paleocoordinates: | 64.3° South, 58.5° West |
Basis of coordinate: | stated in text |
Geographic resolution: | outcrop |
Time
Period: | Paleogene | Epoch: | Eocene |
Stage: | Priabonian | 10 m.y. bin: | Cenozoic 3 |
Key time interval: | Priabonian | ||
Age range of interval: | 38.00000 - 33.90000 m.y. ago | ||
Age estimate: | 34.2 to 34.0 Ma (other) |
Stratigraphy
Formation: | La Meseta | Member: | Unit III | ||
Stratigraphic resolution: | member | ||||
Stratigraphy comments: La Meseta Unit III of Zinsmeister and Camacho (1982); Submeseta according to Reguero et al., 2013
Strontium dating indicates Telm 7 to have been deposited between 39.1 and 34.0 Ma [148]. Samples from near the top of the formation fall closest to the presumed fossil horizon [145, 147], thus indicating an age of 34.2–34.0 Ma [148, 149]. (Marx & Fordyce, 2015) |
Lithology and environment
Primary lithology: | fine,medium sandstone |
Includes fossils? | Y |
Lithology description: homogeneous medium to fine-grained, moderately to well-sorted sand | |
Environment: | lagoonal |
Geology comments: shallow marine or strand line conditions, shallow, nearshore; estuary and delta, with tidal flats, channels, and inlets; tide-dominated |
Taphonomy
Modes of preservation: | body,mold/impression,original phosphate |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | good |
Associated major elements: | some |
Collection methods and comments
Collection methods: | surface (float),field collection |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | USNM |
Metadata
Database number: | 45723 | ||
Authorizer: | M. Uhen | Enterer: | M. Uhen |
Modifier: | B. Shipps | Research group: | vertebrate |
Created: | 2004-11-29 06:51:21 | Last modified: | 2017-02-26 15:36:56 |
Access level: | the public | Released: | 2004-11-29 06:51:21 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
57928. | D. H. Elliot, C. Rinaldi, W. J. Zinsmeister, T. A. Trautman, W. A. Bryant and R. Valle. 1975. Geological investigations on Seymour Island, Antarctic Peninsula. Antarctic Journal 10(4):182-186 [M. Uhen/M. Uhen] |
Secondary references:
15047 | M. Borsuk-Bialynicka. 1988. New remains of Archaeoceti from the Paleogene of Antarctica. Polish Polar Research 9(4):437-445 [M. Uhen/M. Uhen] | |
40308 | M. A. Cozzuol. 1988. Comentarios sobre los Archaeoceti: (Mammalia: Cetacea) de la Isla Vicecomodoro Marambio, Antartida. Yornadas Argentinas de Paleontologia de Vertebrados Resumens 5:32 [M. Uhen/M. Uhen] | |
55050 | F. G. Marx and R. E. Fordyce. 2015. Baleen boom and bust: a synthesis of mysticete phylogeny, diversity and disparity. Royal Society Open Science 2:140434 [M. Uhen/M. Uhen] | |
12039 | E. D. Mitchell. 1989. A new cetacean from the late Eocene La Meseta Formation, Seymour Island, Antarctic Peninsula. Canadian Journal of Fisheries and Aquatic Sciences 46(12):2219-2235 [M. Uhen/M. Uhen/M. Uhen] | |
47119 | M. Reguero, F. Goin, C. A. Hospitaleche, S. Marenssi, and T. Dutra. 2013. The Terrestrial Biotic Dimension of West Antarctica. SpringerBriefs in Earth System Sciences 55-110 [M. Uhen/M. Uhen] | |
40307 | M. A. Reguero and Z. Gasparini. 2007. Late Cretaceous-Early Tertiary marine and terrestrial vertebrates from james Ross Basin, Antarctic Peninsula: A review. In J. Rabassa, M. L. Borla (eds.), Antarctic Peninsula & Tierra del Fuego 55-76 [M. Uhen/M. Uhen] | |
42488 | M. D. Uhen. 2013. A review of North American Basilosauridae. Alabama Museum of Natural History Bulletin 31(2):1-45 [M. Uhen/M. Uhen/M. Uhen] |