Prydz Bay Unit III (Eocene of Antarctica)

Where: Prydz Bay, Antarctica (69.0° S, 75.0° E: paleocoordinates 68.2° S, 69.6° E)

• coordinate estimated from map

When: Marine dinocyst other zone, Late/Upper Eocene (37.2 - 33.9 Ma)

• The proposed Late Eocene age of sediments between 142.5 and 240.36 mbsf at Site 1166 is primarily based on marine dinocyst and acritarch species (see discussion in Macphail and Truswell 2004a).

Environment/lithology: delta plain; silty, sandy lithology not reported

• During the period represented by Units II and III, the East Antarctic ice sheet extended from the mountain front down to sea level and onto the continental shelf. Unit III probably represents glacial outwash sands deposited on an alluvial plain or delta (Whitehead et al. 2006).

•The sedimentary record at Site 1166 shows that the sequence spans the transition from preglacial to glacial conditions.

• Unit III (156.62–267.17 mbsf), which consists of massive and deformed sands with a silty clay matrix in its lower parts, is rich in organic matter and includes pieces of wood.

Size class: microfossils

Preservation: original sporopollenin

Collection methods: chemical,

• The material that forms the basis of the present study comes from ODP Site 1166 in Prydz Bay, drilled during Leg 188 of the Ocean Drilling Program.

Primary reference: E. M. Truswell and M. K. Macphail. 2009. Polar forests on the edge of extinction: what does the fossil spore and pollen evidence from East Antarctica say?. Australian Systematic Botany (22)57-106 [C. Jaramillo/C. Jaramillo]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 168824: authorized by Carlos Jaramillo, entered by Carlos Jaramillo on 30.04.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pinales - Podocarpaceae
 Pinales - Araucariaceae
 Pinales - Taxodiaceae
Cupressacites spp. Bolkhovitina 1956
 Arecales - Arecaceae
 Arecales -
Arecipites spp. Nichols et al. 1973
 Liliales - Liliidae
Liliacidites spp. Couper 1953
 Monocots -
 Poales - Poaceae
Graminidites spp. Potonie 1960
Laevigatosporites ovatus Wilson and Webster 1946
L. ovatus–major
Cyathidites minor Couper 1953
C. minor–australis
 Schizaeales -
 Gleicheniales - Matoniaceae
Dictyophyllidites cf. arcuatus Pocknall and Mildenhall 1984
 Gleicheniales - Gleicheniaceae
Clavifera triplex Bolkhovitina 1966
Gleicheniidites spp. Dettmann 1963
 Polypodiales -
  - Selaginellaceae
Neoraistrickia cf. taylorii Playford and Dettmann 1965
  - Lycopodiaceae
Retitriletes spp. Pierce 1961
Malvacipollis spp. Harris 1965
Gambierina cf. edwardsii
Extinct clade
Gambierina rudata
Extinct clade
Ericipites spp. Wodehouse 1933
Haloragacidites harrisii Mildenhall and Harris 1971
Rhoipites "sp. A" Wodehouse 1933
Rhoipites "sp. E" Wodehouse 1933
Forcipites cf. stipulatus Dettmann and Jarzen 1988
Extinct clade
Forcipites sabulosus Dettmann and Jarzen 1988
 Myrtales -
Myrtaceidites parvus
M. parvus/mesonesus
 Sapindales - Sapindaceae
 Proteales - Proteaceae
Propylipollis "sp. A" Martin and Harris 1975
Propylipollis "sp. B" Martin and Harris 1975
Propylipollis "sp. C" Martin and Harris 1975
Propylipollis "sp. D" Martin and Harris 1975
Propylipollis "sp. E" Martin and Harris 1975
Propylipollis cf. tenuiexinus Dettmann and Jarzen 1996
Banksieaeidites spp. Cookson 1950
 Proteales -
 Fagales -
Nothofagidites emarcidus
N. emarcidus complex
Nothofagidites brachyspinulosus Harris 1965
N. brachyspinulosus complex
Nothofagidites lachlaniae Pocknall and Mildenhall 1984
N. lachlaniae complex
Nothofagidites asperus Cookson 1958
N. asperus complex
Nothofagidites flemingii Potonie 1960
N. flemingii complex
Tricolpites "sp. B" Potonié 1960
Tricolpites "sp. C" Potonié 1960
Tricolpites "sp. D" Potonié 1960
 Gymnospermophyta -
Vitreisporites pallidus Nilsson 1958
Australopollis obscurus
Balmeiopsis limbata
Balmeiopsis limbata Archangelsky 1979
Quintiniapollis spp. Mildenhall and Pocknall 1989
Cyperaceaepollis neogenicus