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

The last forests on Antarctica: Reconstructing flora and temperature from the Neogene Sirius Group, Transantarctic Mountains
Abstract Fossil-bearing deposits in the Transantarctic Mountains, Antarctica indicate that, despite the cold nature of the continent’s climate, a tundra ecosystem grew during periods of ice sheet
Resolving views on Antarctic Neogene glacial history – the Sirius debate
  • P. Barrett
  • Geology
    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
Paleosols in the Transantarctic Mountains: indicators of environmental change
Abstract. The Transantarctic Mountains (TAMs), a 3500 km long chain that subdivides East Antarctica from West Antarctica, are important for reconstructing the tectonic, glacial, and climatic history
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
Problematic megafossils in Cambrian palaeosols of South Australia
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 variety of
Ediacaran Gaskiers Glaciation of Newfoundland reconsidered
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


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
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
Southern Ocean pliocene paleotemperature variation from high-resolution silicoflagellate biostratigraphy
Abstract Applying the modern biogeographic distribution of silicoflagellate genera Dictyocha and Distephanus and calcareous nannoplankton as an analog, the biostratigraphic record of these
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