Macrofossil assemblage from Jason Peninsula - R.6647: Kimmeridgian - Early/Lower Tithonian, Antarctica
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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informal Pectinid sp.
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| close to Camptonectes (Camptonectes) robusta | ||||||||||
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Bivalvia
- Pectinida
- Buchiidae
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Malayomaorica malayomaorica
(Krumbeck 1923)
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Bivalvia
- Pectinida
- Oxytomidae
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Oxytoma sp.
(Meek and Hayden 1865)
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| original and current combination Avicula (Oxytoma) | ||||||||||
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Bivalvia
- Carditida
- Astartidae
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"Astarte" marwicki
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Bivalvia
- Pholadida
- Pleuromyidae
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Pleuromya sp.
(Meek 1873)
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| original and current combination Myacites (Pleuromya) | ||||||||||
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Bivalvia
- Trigoniida
- Megatrigoniidae
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Pterotrigonia (Pterotrigonia) thomsoni
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Bivalvia
- Trigoniida
- Myophorellidae
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Vaugonia ? sp.
Crickmay 1930
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Myophorella (Scaphogonia) cf. purseri
Fleming 1987
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Cephalopoda
- Ammonitida
- Perisphinctidae
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Virgatosphinctes cf. andesensis
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Virgatosphinctes cf. denseplicatus
(Waagen 1875)
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Bennettitales
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Williamsonia sp.
Carruthers 1870
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| see common names | ||||||||||
Geography
| Country: | Antarctica |
| Coordinates: | 66.0° South, 60.6° West (view map) |
| Paleocoordinates: | 56.3° South, 32.6° West |
| Basis of coordinate: | stated in text |
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Late/Upper Jurassic |
| Key time interval: | Kimmeridgian - Early/Lower Tithonian | ||
| Age range of interval: | 154.80000 - 146.30000 m.y. ago |
Stratigraphy
| Formation: | Latady | Local bed: | R.6647 | ||
| Stratigraphy comments: "early Tithonian" is used in a local, Antarctic sense. It refers to the perisphinctid-dominated ammonite fauna which occurs in the lower levels of the extensive Himalia Ridge Formation, Fossil Bluff Group, Alexander Island. |
Lithology and environment
| Primary lithology: | planar lamination,fine,medium,volcaniclastic,gray lithified sandstone | ||
| Lithology description: grey, grey-green and grey-brown sandstones | |||
| Environment: | foreshore | Tectonic setting: | back-arc basin |
Taphonomy
| Modes of preservation: | mold/impression,trace,recrystallized |
| Size of fossils: | macrofossils |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: all specimens are housed in the collections of the Geoscience Division, British Antarctic Survey, Cambridge | |
Metadata
| Database number: | 36767 | ||
| Authorizer: | M. Aberhan | Enterer: | S. Nurnberg |
| Modifier: | S. Nurnberg | Research group: | marine invertebrate |
| Created: | 2004-02-15 12:12:53 | Last modified: | 2004-02-17 05:02:04 |
| Access level: | the public | Released: | 2004-02-15 12:12:53 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 9854. | T. R. Riley, J. A. Crame, M. R. A. Thomson and D. J. Cantrill. 1997. Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a significant northward extension of the Latady Formation. Antarctic Science 9(4):434-442 [M. Aberhan/S. Nurnberg/S. Nurnberg] |