U1356 Unit XI 106R: Early/Lower Eocene, Antarctica
collected by IODP
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Gleichenidiites spp. microspore
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Scabratisporis sp. microspore
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Psilatriporites spp. microspore
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? Alisporites tenuicorpus microspore
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Podocarpidites sp./Alisporites tenuicorpus? | ||||||||||
Retitriporites sp. microspore
Ramanujam 1966
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Pteridopsida
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Granulatisporites sp. microspore
Potonié and Kremp 1954
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Cyathidites spp. microspore
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Ischyosporites sp. microspore
Balme 1957
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Ischyosporites sp./Cibotiidites sp. | ||||||||||
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. | ||||||||||
Polypodiopsida
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? Punctatosporites sp. microspore
Ibrahim 1933
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Bryopsida
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Stereisporites sp. microspore
Pflug 1953
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Stereisporites (Tripunctisporis) sp. | ||||||||||
Equisetopsida
- Araucariaceae
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Dilwynites granulatus microspore
Harris 1965
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Araucariacites spp. microspore
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unclassified
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Psilatricolpites spp. microspore
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Psilabrevitricolporites sp. microspore
Van der Kaars 1983
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Psilastephanoporites sp. microspore
Regali et al. 1974
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Psilamonocolpites sp. microspore
Van der Hammen and Garcia de Mutis 1966
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Lycopodiopsida
- Selaginellales
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Camarozonosporites sp. microspore
Potonié 1956
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Densoisporites sp. microspore
Dettmann 1963
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Densoisporites sp./Cingulatisporites sp. | ||||||||||
Magnoliopsida
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Brevitricolpites sp. microspore
González-Guzmán 1967
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Psilatricolporites spp. microspore
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Gambierina edwardsii microspore
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Malvacipollis spp. microspore
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Retitricolporites spp. microspore
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Coniferales
- Podocarpaceae
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Phyllocladidites mawsonii microspore
Cookson 1947
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Podocarpidites spp. microspore
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Dacrycarpites sp. microspore
Cookson and Pike 1953
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Microcachryidites antarticus microspore
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Angiospermae
- Proteales
- Proteaceae
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Triporopollenites sp. microspore
Pflug and Thomson 1953
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Triporopollenites cf. ambiguus microspore
Couper 1973
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Proteacidites aff. reticuloscabratus microspore
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Proteacidites annularis microspore
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Proteacidites cf. callosus microspore
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Proteacidites cf. callosus/P. cf. scaboratus | ||||||||||
Proteacidites cf. crassus microspore
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Proteacidites cf. ornatus microspore
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Proteacidites cf. tuberculatus microspore
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Proteacidites reticuloscabratus microspore
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Proteacidites similis microspore
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Proteacidites sp. microspore
Cookson and Couper 1953
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Proteacidites symphyonemoides microspore
Cookson 1950
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Proteacidites cf. pseudomoides microspore
Stover 1973
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Proteacidites cf. amolosexinus microspore
Dettmann and Playford 1968
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Proteacidites cf. subscabratus microspore
Couper 1960
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Proteacidites parvus microspore
Cookson 1950
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Angiospermae
- Gunnerales
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Tricolpites sp. microspore
Couper 1953
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Angiospermae
- Arecaceae
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Arecipites spp. microspore
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Angiospermae
- Poales
- Poaceae
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? Graminidites sp. microspore
Potonie 1960
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Angiospermae
- Malvales
- Bombacaceae
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Bombacacidites informal sp. A microspore
Couper 1960
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Angiospermae
- Fagales
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Nothofagidites spp. microspore
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Nothofagidites asperus microspore
Cookson 1958
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N. asperus complex | ||||||||||
Nothofagidites lachlaniae microspore
Pocknall and Mildenhall 1984
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Nothofagidites flemingii microspore
Potonie 1960
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Angiospermae
- Fagales
- Myricaceae
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Myricipites harrisii microspore
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unclassified
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Retistephanocolporites sp. microspore
Van der Hammen and Wijmstra 1966
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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: | bioturbation,green silty claystone |
Secondary lithology: | sandstone |
Lithology description: Unit XI (Cores -101R to -106R; 948.8 to 1000.08 mbsf) consists predominantly of dark green, bioturbated claystone that is faintly stratified (millimetre- to meter-scale) as defined by colour variations (light to dark bands), and subordinate laminated siltstone and sandstone interbeds. | |
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: | 169275 | ||
Authorizer: | C. Jaramillo | Enterer: | C. Jaramillo | Research group: | micropaleontology |
Created: | 2015-05-14 10:39:23 | Last modified: | 2015-05-14 10:39:23 |
Access level: | the public | Released: | 2015-05-14 10:39:23 |
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] |