Shenk Peak (Fremouw Fm., 28 m above base of section): Early/Lower Triassic, Antarctica
collected by J. W. Cosgriff, W. R. Hammer, among others 1977-1978
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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? Austrobrachyops jenseni
Colbert and Cosgriff 1974
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Cosgriff and Hammer 1984 | 1 specimen | ||||||||
| nomen dubium belonging to Tetrapoda | ||||||||||
| WSUVP 1019 | ||||||||||
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Anomodontia
- Lystrosauridae
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Lystrosaurus maccaigi
Seeley 1898
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1 individual | |||||||||
| WSU 0974 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Antarctica |
| Coordinates: | 85.1° South, 174.8° West (view map) |
| Paleocoordinates: | 81.8° South, 69.8° East |
| Basis of coordinate: | stated in text |
| Geographic resolution: | small collection |
Time
| Period: | Triassic | Epoch: | Early/Lower Triassic |
| 10 m.y. bin: | Triassic 1 | ||
| *Period: | Early/Lower Triassic | *Epoch: | Scythian |
| Key time interval: | Early/Lower Triassic | Zone: | Lystrosaurus |
| Age range of interval: | 251.90200 - 247.20000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Beacon | Formation: | Fremouw | ||
| Local section: | Shenk Peak | Local bed: | 28 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "28 m above formational base (for WSU 0974)." (Cosgriff et al., 1982); In Collinson et al. (2006, GSA Bull. 118(5/6) pp. 755/756) it is said that the base of the Fremouw Fm. is not exposed in the section and that the lowest vertebrate-bearing bed (incl. Lystrosaurus maccaigi) is 28 m above the base of the section. | |||||
Lithology and environment
| Primary lithology: | desiccation cracks,burrows mudstone | ||
| Includes fossils? | Y | ||
| Environment: | "floodplain" | Tectonic setting: | foreland basin |
| Geology comments: The "fine-grained mudstone" layer from which the specimen was collected "appears just below the termination of the first [fining-upwards] lithologic cycle." | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Articulated whole bodies: | none |
| Associated major elements: | none |
| Disassociated major elements: | all |
| Disassociated minor elements: | none |
Collection methods and comments
| Collection excludes: | some macrofossils,ichnofossils | ||
| Collection methods: | field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | J. W. Cosgriff, W. R. Hammer, among others | Collection dates: | austral summer 1977-1978 |
| Collection method comments: WSU = Wayne State University Museum of Natural History, Detroit, Michigan | |||
Metadata
| Also known as: | Cumulus Hills | ||
| Database number: | 27265 | ||
| Authorizer: | J. Alroy, R. Butler | Enterer: | R. Whatley, R. Butler |
| Modifier: | T. Liebrecht | Research group: | vertebrate |
| Created: | 2002-11-26 13:51:24 | Last modified: | 2009-03-17 13:18:23 |
| Access level: | the public | Released: | 2002-11-26 13:51:24 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 7538. | 5% 30000 | J. W. Cosgriff, W. R. Hammer, and W. J. Ryan. 1982. The Pangaean reptile, Lystrosaurus maccaigi, in the Lower Triassic of Antarctica. Journal of Paleontology 56(2):371-385 [J. Alroy/R. Whatley/R. Whatley] |
Secondary references:
| 43612 | J. W. Cosgriff and W. R. Hammer. 1984. New material of labyrinthodont amphibians from the Lower Triassic Fremouw Formation of Antarctica. Journal of Vertebrate Paleontology 4(1):47-56 [R. Butler/R. Butler] |