Prydz Bay Unit II (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: terrestrial; claystone

• 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 II contains dropstones or lonestones signalling the arrival of glaciers at sea level in Prydz Bay.

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

• Unit II (135.63–156.62 mbsf) is composed of diatom-bearing claystones, with thin interbedded silts.

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 168823: authorized by Carlos Jaramillo, entered by Carlos Jaramillo on 30.04.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Chlorophyceae
  -
Botryococcus spp. Kutzing 1849
Pinopsida
 Pinales - Podocarpaceae
 Pinales - Araucariaceae
Monocotyledoneae
 Arecales -
Arecipites spp. Nichols et al. 1973
 Restionales - Commelinidae
 Liliales - Liliidae
Liliacidites spp. Couper 1953
Pteridopsida
  -
Laevigatosporites ovatus Wilson and Webster 1946
L. ovatus–major
Cyathidites minor Couper 1953
C. minor-australis
 Schizaeales -
Ruffordiaspora australiensis Dettmann and Clifford 1992
 Gleicheniales - Matoniaceae
Dictyophyllidites cf. arcuatus Pocknall and Mildenhall 1984
 Gleicheniales - Gleicheniaceae
Gleicheniidites spp. Dettmann 1963
 Polypodiales -
  -
Lycopsida
  - Selaginellaceae
  - Lycopodiaceae
Retitriletes spp. Pierce 1961
Bryopsida
  -
Coptospora
  -
Magnoliopsida
  -
Dicotyledonae
 Theales - Dilleniidae
Ilexpollenites spp. Thiergart 1937
Magnoliopsida
  -
Rhoipites "sp. B" Wodehouse 1933
Rhoipites "sp. C" Wodehouse 1933
Rhoipites "sp. D" Wodehouse 1933
 Proteales - Proteaceae
 Proteales -
Proteacidites "sp. A" Cookson and Couper 1953
Proteacidites "sp. B" Cookson and Couper 1953
Proteacidites "sp. C" Cookson and Couper 1953
  -