U1356 Unit X 96R: Early/Lower Eocene, Antarctica
collected by IODP
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Bisaccate indet. microspore
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Echinate informal trilete spores microspore
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Gleichenidiites spp. microspore
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Scabratisporis sp. microspore
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Equisetopsida
- Araucariaceae
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Araucariacites spp. microspore
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Dilwynites granulatus microspore
Harris 1965
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Angiospermae
- Fagales
- Myricaceae
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Myricipites harrisii microspore
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Angiospermae
- Fagales
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Nothofagidites lachlaniae microspore
Pocknall and Mildenhall 1984
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N. lachlaniae complex | ||||||||||
Nothofagidites flemingii microspore
Potonie 1960
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N. flemingii complex | ||||||||||
Nothofagidites asperus microspore
Cookson 1958
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N. asperus complex | ||||||||||
Angiospermae
- Proteales
- Proteaceae
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Triporopollenites sp. microspore
Pflug and Thomson 1953
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Triporopollenites informal sp.1 microspore
Pflug and Thomson 1953
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Proteacidites sp. microspore
Cookson and Couper 1953
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Proteacidites parvus microspore
Cookson 1950
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Proteacidites cf. subscabratus microspore
Couper 1960
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Proteacidites symphyonemoides microspore
Cookson 1950
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Coniferales
- Podocarpaceae
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Podocarpidites spp. microspore
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Phyllocladidites mawsonii microspore
Cookson 1947
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Microcachryidites antarticus microspore
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Magnoliopsida
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Malvacipollis spp. microspore
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Lycopodiopsida
- Selaginellales
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Camarozonosporites cf. ohaiensis microspore
Dettmann and Playford 1968
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Pteridopsida
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Cyathidites spp. microspore
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Cyathidites spp. | ||||||||||
Polypodiopsida
- Polypodiaceae
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Laevigatosporites spp. microspore
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Polypodiopsida
- Osmundaceae
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Baculatisporites spp. microspore
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Baculatisporites spp./Osmundacidites spp. | ||||||||||
unclassified
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Psilatriporites spp. microspore
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see common names |
Geography
Country: | Antarctica |
Coordinates: | 63.3° South, 136.0° East (view map) |
Paleocoordinates: | 63.9° South, 132.7° East |
Basis of coordinate: | stated in text |
Time
Period: | Paleogene | Epoch: | Eocene |
Stage: | Ypresian | 10 m.y. bin: | Cenozoic 2 |
Key time interval: | Early/Lower Eocene | ||
Age range of interval: | 56.00000 - 47.80000 m.y. ago |
Stratigraphy
Stratigraphy comments: The lowermost 110 meters of sediments recovered at IODP Site U1356 (895.5 to 1000.08 meters below sea floor [mbsf], lithostratigraphic Units X and XI) are dated as Early to Middle Eocene in age based on the integration of dinoflagellate cyst (dinocyst) biostratigraphy and magnetostratigraphy (Expedition 318 Scientists. Site U1356. in Escutia, C., Brinkhuis, H., Klaus, A., and the Expedition 318 Scientists. Proc. IODP 318 (2011)). |
Lithology and environment
Primary lithology: | silty claystone |
Secondary lithology: | sandstone |
Lithology description: Unit X (Cores -96R to -100R; 895.5 to 948.8 mbsf) consists of interbedded stratified and massive sandstones, diamictites, silty claystones, and siltstones exhibiting graded bedding and parallel lamination. Intraformational clasts occur abundantly in the fining-upward sandstones. In the lowermost intervals of Unit X, distinctive reddish brown silty claystones are repetitively interbedded at the decimeter- to meter-scale with greenish gray and brown, laminated sandy mudstones | |
Environment: | shallow subtidal indet. |
Geology comments: Based on information from dinocyst assemblages, sediments of Units X and XI were deposited in mid-shelfal settings (Expedition 318 Scientists. Site U1356. in Escutia, C., Brinkhuis, H., Klaus, A., and the Expedition 318 Scientists. Proc. IODP 318 (2011)). |
Taphonomy
Modes of preservation: | original sporopollenin |
Size of fossils: | microfossils |
Abundance in sediment: | abundant |
Collection methods and comments
Collection methods: | core,chemical,hydrochloric,hydroflouric,survey of museum collection |
Reason for describing collection: | paleoecologic analysis |
Collectors: | IODP |
Collection method comments: This research used samples and data provided by the Integrated Ocean Drilling Program (IODP).
A total of 145 palynological samples, taken from the Eocene interval of Site U1356 at a resolution of 20-30 cm, were processed using identical protocols at the Institute of Geosciences of Goethe University Frankfurt and the Laboratory of Palaeobotany and Palynology of Utrecht University. |
Metadata
Database number: | 169264 | ||
Authorizer: | C. Jaramillo | Enterer: | C. Jaramillo | Research group: | micropaleontology |
Created: | 2015-05-13 19:43:45 | Last modified: | 2015-05-13 19:43:45 |
Access level: | the public | Released: | 2015-05-13 19:43:45 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
55271. | fossil record | J. Pross, L. Contreras, P. K. Bijl, D. R. Greenwood, S. M. Bohaty, S. Schouten, J. A. Bendle, U. Röhl, L. Tauxe, J. I. Raine, C. E. Huck, T. Flierdt, S. S. R. Jamieson, C. E. Stickley, B. Schootbrugge, C. Escutia, H. Brinkhuis and Integrated Ocean Drilling Program. 2012. Persistent near-tropical warmth on the Antarctic continent during the early Eocene epoch. Nature (488)73-77 [C. Jaramillo/C. Jaramillo/M. Uhen] |