U1356 Unit XI 101R (Eocene of Antarctica)

Where: Antarctica (63.3° S, 136.0° E)

• Paleocoordinates: 62.8° S, 150.5° E (Wright 2013)

• coordinate stated in text

When: Early/Lower Eocene (55.8 - 48.6 Ma)

• 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)).

Environment/lithology: shallow subtidal; bioturbated, green, silty claystone and sandstone

• 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)).
• 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.

Size class: microfossils

Preservation: original sporopollenin

Collected by IODP

Collection methods: core, chemical, hydrochloric, hydroflouric,

• 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.

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 169269: authorized by Carlos Jaramillo, entered by Carlos Jaramillo on 14.05.2015

Creative Commons license: CC0 (CC0)

Taxonomic list

unclassified
  -
Alisporites
  -
? Alisporites tenuicorpus
Podocarpidites sp./Alisporites tenuicorpus?
Dicotyledoneae
 Myrtales -
Angiospermae
 Malvales - Tiliaceae
 Fagales -
Nothofagidites cf. emarcidus
N cf. emarcidus complex
Nothofagidites spp. Potonié 1960
Nothofagidites flemingii Potonie 1960
N. flemingii complex
Nothofagidites lachlaniae Pocknall and Mildenhall 1984
N. lachlaniae complex
Nothofagidites asperus Cookson 1958
N. asperus complex
 Fagales - Myricaceae
 Fabales - Fabaceae
 Gunnerales -
Tricolpites sp. Couper 1953
 Proteales - Proteaceae
 Santalales -
 Mesangiosperms - Arecaceae
Arecipites spp. Nichols et al. 1973 palm
 Poales - Poaceae
Graminidites sp. Potonie 1960 bamboo
Magnoliopsida
  -
Rhoipites spp. Wodehouse 1933
Retitricolporites spp. Van der Hammen and Wymstra 1964
Malvacipollis sp. Harris 1965
? Tetracolporites oamaruensis
Tetracolporites oamaruensis?/ T. "complexum"
Brevitricolpites sp. González-Guzmán 1967
Brownlowia type
 Coniferales - Podocarpaceae
Podosporites sp. Rao 1943 podocarp
Dacrydiumites spp. Harris 1965 podocarp
Podocarpidites sp. Cookson 1947 podocarp
Phyllocladidites mawsonii Cookson 1947 podocarp
Equisetopsida
 Pinidae - Pinidae
Araucariacites spp. Cookson and Couper 1953
Psilatricolpites
  -
Psilatricolpites spp. Van der Hammen and Wijmstra 1964
Psilastephanocolporites
  -
Psilastephanocolporites sp. Leidelmeyer 1966
Psilamonocolpites
  -
Psilamonocolpites sp. Van der Hammen and Garcia de Mutis 1966
Psilabrevitricolporites
  -
Psilabrevitricolporites sp. Van der Kaars 1983
Polypodiopsida
 Polypodiales - Polypodiidae
Polypodiisporites sp. Potonié 1931
 Cyatheales - Polypodiidae
  - Osmundaceae
Baculatisporites spp. Thomson and Pflug 1953
Baculatisporites spp./Osmundacidites spp.
  -
  - Polypodiaceae
Pteridopsida
  -
Cyathidites spp. Couper 1953
Ischyosporites sp. Balme 1957
Ischyosporites sp./Cibotiidites sp.
Lycopodiopsida
 Selaginellales -
Densoisporites sp. Dettmann 1963 clubmoss
Densoisporites sp./Cingulatisporites sp.
Psilatriporites
  -
Psilatriporites sp. Van der Hammen
Bryopsida
  -
Stereisporites sp. Pflug 1953
Stereisporites (Tripunctisporis) sp.