U1356 Unit XI 105R (Eocene of Antarctica)

Where: Antarctica (63.3° S, 136.0° E: paleocoordinates 63.9° S, 132.7° E)

• 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 169274: authorized by Carlos Jaramillo, entered by Carlos Jaramillo on 14.05.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Equisetopsida
 Pinidae - Pinidae
Araucariacites spp. Cookson and Couper 1953
Dilwynites granulatus Harris 1965
Psilamonocolpites
  -
Psilamonocolpites sp. Van der Hammen and Garcia de Mutis 1966
Psilabrevitricolporites
  -
Psilabrevitricolporites sp. Van der Kaars 1983
Retistephanoporites
  -
Retistephanoporites sp. González-Guzmán 1967
Psilatricolpites
  -
Psilatricolpites sp. Van der Hammen and Wijmstra 1964
Psilatricolpites spp. Van der Hammen and Wijmstra 1964
Retitricolpites
  -
Retitricolpites spp. Van der Hammen 1956
Retitriporites
  -
Retitriporites sp. Ramanujam 1966
Lycopodiopsida
 Selaginellales -
Densoisporites sp. Dettmann 1963 clubmoss
Densoisporites sp./Cingulatisporites sp
Alisporites
  -
Psilatriporites
  -
Psilatriporites spp. Van der Hammen
Pteridopsida
  -
Ischyosporites sp. Balme 1957
Ischyosporites sp./Cibotiidites sp.
Granulatisporites sp. Potonié and Kremp 1954
Cyathidites spp. Couper 1953
Polypodiopsida
 Polypodiales - Polypodiidae
Polypodiisporites sp. Potonié 1931
  - Polypodiaceae
  - Osmundaceae
Baculatisporites spp. Thomson and Pflug 1953
Baculatisporites spp./Osmundacidites spp.
Angiospermae
 Malvales - Bombacaceae
 Malvales - Tiliaceae
 Fabales - Fabaceae
 Fagales -
Nothofagidites cf. emarcidus
N. cf. emarcidus complex
Nothofagidites spp. Potonié 1960
Nothofagidites lachlaniae Pocknall and Mildenhall 1984
N. achlaniae complex
Nothofagidites asperus Cookson 1958
N. asperus complex
Nothofagidites flemingii Potonie 1960
N. flemingii complex
 Fagales - Myricaceae
Dicotyledoneae
 Ericales - Ericaceae
Ericipites sp. Wodehouse 1933 heather
 Myrtales -
Angiospermae
 Gunnerales -
Tricolpites sp. Couper 1953
 Proteales - Proteaceae
Beaupreaidites sp. Potonié 1960
Triporopollenites sp. Pflug and Thomson 1953
Triporopollenites "sp. 1" Pflug and Thomson 1953
Proteacidites "constrictus" Cookson and Couper 1953
Proteacidites cf. callosus
Proteacidites cf. callosus/P. cf. scaboratus
Proteacidites cf. incurvatus
Proteacidites cf. incurvatus/P. cf. granoratus
Proteacidites sp. Cookson and Couper 1953
Proteacidites "sp. 2" Cookson and Couper 1953
Proteacidites "sp. 3" Cookson and Couper 1953
Proteacidites "sp. 4" Cookson and Couper 1953
Proteacidites parvus Cookson 1950
Proteacidites cf. amolosexinus Dettmann and Playford 1968
 Proteales -
Peninsulapollis sp. Dettmann and Jarzen 1988
Peninsulapollis sp./Tricolpites sp.4 (Truswell, 1983)
 Mesangiosperms - Arecaceae
Arecipites spp. Nichols et al. 1973 palm
? Arecipites "microverrucatus" Nichols et al. 1973 palm
 Coniferales - Podocarpaceae
Phyllocladidites mawsonii Cookson 1947 podocarp
Podocarpidites sp./Alisporites tenuicorpus?
Dacrycarpites sp. Cookson and Pike 1953 podocarp
Podocarpidites spp. Cookson 1947 podocarp
Magnoliopsida
  -
Marchantiopsida
  - Marchantiidae
Bryopsida
  -
Stereisporites sp. Pflug 1953
Stereisporites (Tripunctisporis) sp
 Life -
Retistephanocolporites sp. Van der Hammen and Wijmstra 1966