New grounds for reassessing palaeoclimate of the Sirius Group, Antarctica

  title={New grounds for reassessing palaeoclimate of the Sirius Group, Antarctica},
  author={Gregory J. Retallack and Evelyn S. Krull and James G. Bockheim},
  journal={Journal of the Geological Society},
  pages={925 - 935}
Fossil Nothofagus leaves from the Meyer Desert Formation of the Sirius Group in the central Transantarctic Mountains have been found with recycled marine diatoms indicating that they are no older than 4.1–3.1 Ma; they have been interpreted as evidence for Pliocene warming and diminution of the East Antarctic Ice Cap. In contrast, Plio-Pleistocene ice-cap stability and sustained polar palaeoclimate has been argued from landforms in Victoria Land and isotopic data from the Southern Ocean. New… 

Figures and Tables from this paper

Resolving views on Antarctic Neogene glacial history – the Sirius debate

  • P. Barrett
  • Environmental Science, Geography
    Earth and Environmental Science Transactions of the Royal Society of Edinburgh
  • 2013
ABSTRACT The discovery of marine Pliocene diatoms in warm-based glacial deposits (now termed the Sirius Group) high in the Transantarctic Mountains in the 1980s began a three-decade-long controversy

Problematic megafossils in Cambrian palaeosols of South Australia

Abstract:  Red calcareous Middle Cambrian palaeosols from the upper Moodlatana Formation in the eastern Flinders Ranges of South Australia formed in well‐drained subhumid floodplains and include a

Tundra environments in the Neogene Sirius Group, Antarctica: evidence from the geological record and coupled atmosphere–vegetation models

The Neogene Meyer Desert Formation, Sirius Group, at Oliver Bluffs in the Transantarctic Mountains, contains a sequence of glacial deposits formed under a wet-based glacial regime. Within this

Soils of Antarctica: A key to past environments

Ediacaran Gaskiers Glaciation of Newfoundland reconsidered

  • G. Retallack
  • Environmental Science, Geography
    Journal of the Geological Society
  • 2013
Newly discovered palaeosols in the Gaskiers Formation of Newfoundland provide a new perspective on its palaeoenvironment, and are evidence that it was not a deep submarine tillite, nor an anoxic

Neogene glacial record from the Sirius Group of the Shackleton Glacier region, central Transantarctic Mountains, Antarctica

Neogene glacigenic strata, collectively referred to as the Sirius Group, are widely distributed throughout the Transantarctic Mountains. The group is particularly well exposed near the head of



Fossil plants from the Pliocene Sirius Group, Transantarctic Mountains; evidence for climate from growth rings and fossil leaves

Fossil wood and leaves of Nothofagus beardmorensis Hill, Harwood and Webb occur within the Sirius Group in Antarctica, a sequence of Pliocene glacial sediments that crop out in the Transantarctic

Implications of a Pliocene stand of Nothofagus (southern beech) within 500 kilometres of the South Pole

Branches, stems and roots of Nothofagus (southern beech) were reported from the Beardmore Glacier area (Sirius Formation) some 500 km from the South Pole. The Sirius Formation is a glacially derived

Pliocene-Pleistocene diatoms in Paleozoic and Mesozoic sedimentary and igneous rocks from Antarctica: A Sirius problem solved

There are two competing scenarios on the behavior of the East Antarctic ice sheet during the late Tertiary. In one scenario, the ice sheet was very dynamic and underwent major drawdown and renewal as

Preservation of Miocene glacier ice in East Antarctica

ANTARCTIC climate during the Pliocene has been the subject of considerable debate. One view holds that, during part of the Pliocene, East Antarctica was largely free of glacier ice and that

Geochronological evidence supporting Antarctic deglaciation three million years ago

THE response of the Antarctic ice sheets to increased global temperatures is an important unresolved issue in the assessment of future climate change. In particular, considerable controversy exists