A case for Sirius Group alpine glaciation at Mount Fleming, South Victoria Land, Antarctica: A case against Pliocene East Antarctic Ice Sheet reduction

1997 ◽  
Vol 109 (7) ◽  
pp. 825-840 ◽  
Author(s):  
Arjen P. Stroeven ◽  
Michael L. Prentice
Keyword(s):  
Ice Sheet ◽  
Antarctic Ice Sheet ◽  
Victoria Land ◽  
East Antarctic Ice Sheet

Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5–7 Ma)

2012 ◽  
Vol 57 ◽  
pp. 85-94 ◽  
Author(s):  
Luigia Di Nicola ◽  
Carlo Baroni ◽  
Stefan Strasky ◽  
Maria Cristina Salvatore ◽  
Christian Schlüchter ◽  
...  
Keyword(s):  
Late Miocene ◽  
Ice Sheet ◽  
Cosmogenic Nuclides ◽  
Antarctic Ice Sheet ◽  
Victoria Land ◽  
The Stability ◽  
East Antarctic Ice Sheet

scholarly journals The East Antarctic Ice Sheet: The Problem of Palaeoglaciological Reconstruction (Abstract only)

1982 ◽  
Vol 3 ◽  
pp. 344 ◽  
Author(s):  
V.I. Bardin
Keyword(s):  
Ice Sheet ◽  
East Antarctica ◽  
Regional Studies ◽  
Glacial Deposits ◽  
Antarctic Ice Sheet ◽  
Space And Time ◽  
Victoria Land ◽  
East Antarctic Ice Sheet ◽  
Comprehensive Studies

Palaeoglaciological studies, including glaciogeomorphological observations and comprehensive studies of the composition of glacial deposits, undertaken by scientists of a number of countries, enable the major stages in the evolution of glaciation of some regions of East Antarctica to be outlined. In this report, palaeoglaciological reconstructions for certain key territories: Queen Maud Land, Mac. Robertson Land, and Victoria Land are considered. The completeness and reliability of such reconstructions are also discussed. The region of Prince Charles Mountains (Mac. Robertson Land) turned out to be one of the most significant for palaeoglaciology. In this region, the author has discovered and studied glacial deposits of at least six age stages, their formation having taken place during approximately 20 Ma. An attempt is made to compare the results of regional studies and to present the evolution of the development of the whole East Antarctic ice sheet in space and time. Different examples of palaeoglaciological reconstructions of the ice sheet of East Antarctica are presented, the possibilities of different approaches are evaluated practically, and schematic maps of the change in glaciation of East Antarctic regions at different evolutional stages, compiled by the author, are presented for discussion.

scholarly journals Some Aspects of the Cenozoic Glaciation of Southern Victoria Land, Antarctica

1983 ◽  
Vol 29 (102) ◽  
pp. 343-349 ◽  
Author(s):  
Howard Brady ◽  
Barrie McKelvey
Keyword(s):  
Middle Miocene ◽  
Ice Sheet ◽  
Basement Complex ◽  
Antarctic Ice Sheet ◽  
Victoria Land ◽  
Transantarctic Mountains ◽  
East Antarctic Ice Sheet

AbstractPalaeoglacial evidence at three sites in southern Victoria Land has been examined to consider the possible uplift of the Transantarctic Mountains through the East Antarctic ice sheet prior to the Middle Miocene. A Cenozoic tillite at Mount Feather and a striated pavement at Mount Brooke pre-date uplift. Another tillite remnant adjacent to Odell Glacier near Mount Brooke post-dates the uplift and is locally derived. This tillite, together with the Mount Feather tillite, has been previously placed in the Sirius Formation, a term that the authors abandon as it covers tillites of varying ages. Basement complex derived clasts in the Mount Feather tillite. previously reported by these authors, could be inherited from the Jurassic Mawson Formation or the Permian Metschel Tillite but they still provide evidence that the Mount Feather tillite was deposited by a regional glaciation.

scholarly journals Surface exposure ages imply multiple low-amplitude Pleistocene variations in East Antarctic Ice Sheet, Ricker Hills, Victoria Land

2008 ◽  
Vol 21 (1) ◽  
pp. 59-69 ◽  
Author(s):  
Stefan Strasky ◽  
Luigia Di Nicola ◽  
Carlo Baroni ◽  
Maria Cristina Salvatore ◽  
Heinrich Baur ◽  
...  
Keyword(s):  
Global Climate ◽  
Ice Sheet ◽  
Early Pleistocene ◽  
Antarctic Ice Sheet ◽  
Global Climate Changes ◽  
Erosion Rates ◽  
Exposure Dating ◽  
Victoria Land ◽  
Exposure Ages ◽  
East Antarctic Ice Sheet

AbstractOne of the major issues in (palaeo-) climatology is the response of Antarctic ice sheets to global climate changes. Antarctic ice volume has varied in the past but the extent and timing of these fluctuations are not well known. In this study, we address the question of amplitude and timing of past Antarctic ice level changes by surface exposure dating using in situ produced cosmogenic nuclides (10Be and 21Ne). The study area lies in the Ricker Hills, a nunatak at the boundary of the East Antarctic Ice Sheet in southern Victoria Land. By determining exposure ages of erratic boulders from glacial drifts we directly date East Antarctic Ice Sheet variations. Erosion-corrected neon and beryllium exposure ages indicate that a major ice advance reaching elevations of about 500 m above present ice levels occurred between 1.125 and 1.375 million years before present. Subsequent ice fluctuations were of lesser extent but timing is difficult as all erratic boulders from related deposits show complex exposure histories. Sample-specific erosion rates were on the order of 20–45 cm Ma-1 for a quartzite and 10–65 cm Ma-1 for a sandstone boulder and imply that the modern cold, arid climate has persisted since at least the early Pleistocene.

scholarly journals Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes

2007 ◽  
Vol 20 (1) ◽  
pp. 89-98 ◽  
Author(s):  
P. Oberholzer ◽  
C. Baroni ◽  
M.C. Salvatore ◽  
H. Baur ◽  
R. Wieler
Keyword(s):  
Ice Sheet ◽  
Antarctic Ice Sheet ◽  
Erosion Rates ◽  
Ice Surface ◽  
Narrow Valley ◽  
Sampling Locations ◽  
Victoria Land ◽  
Minimum Age ◽  
Exposure Ages ◽  
East Antarctic Ice Sheet

AbstractWe present 21Ne exposure ages of erosional glaciogenic rock surfaces on nunataks in northern Victoria Land, Antarctica: i) in the Prince Albert Mountains and ii) near Mesa Range. These nunataks are located directly at the margin of the polar plateau and therefore provide an immediate record of ice volume changes of the East Antarctic Ice Sheet, not biased by ice shelf grounding or narrow valley sections downstream the outlet glaciers. The sampling locations overlook the present ice surface by less than 200 m, but were last covered by ice 3.5 Ma bp (minimum age, not corrected for erosion). This strongly indicates that the ice sheet has not been substantially thicker than today since at least the early Pliocene, which supports the hypothesis of a stable East Antarctic Ice Sheet. First absolute ages are reported for the alpine topography above the erosive trimline that typically marks the upper limit of glacial activity in northern Victoria Land. Unexpectedly low nuclide concentrations suggest that erosion rates on the alpine topography are considerably higher due to the steep slopes than those affecting flat erosional surfaces carrying Antarctic tors.

scholarly journals The East Antarctic Ice Sheet: The Problem of Palaeoglaciological Reconstruction (Abstract only)

1982 ◽  
Vol 3 ◽  
pp. 344-344
Author(s):  
V.I. Bardin
Keyword(s):  
Ice Sheet ◽  
East Antarctica ◽  
Regional Studies ◽  
Glacial Deposits ◽  
Antarctic Ice Sheet ◽  
Space And Time ◽  
Victoria Land ◽  
East Antarctic Ice Sheet ◽  
Comprehensive Studies

Palaeoglaciological studies, including glaciogeomorphological observations and comprehensive studies of the composition of glacial deposits, undertaken by scientists of a number of countries, enable the major stages in the evolution of glaciation of some regions of East Antarctica to be outlined.In this report, palaeoglaciological reconstructions for certain key territories: Queen Maud Land, Mac. Robertson Land, and Victoria Land are considered. The completeness and reliability of such reconstructions are also discussed.The region of Prince Charles Mountains (Mac. Robertson Land) turned out to be one of the most significant for palaeoglaciology. In this region, the author has discovered and studied glacial deposits of at least six age stages, their formation having taken place during approximately 20 Ma.An attempt is made to compare the results of regional studies and to present the evolution of the development of the whole East Antarctic ice sheet in space and time.Different examples of palaeoglaciological reconstructions of the ice sheet of East Antarctica are presented, the possibilities of different approaches are evaluated practically, and schematic maps of the change in glaciation of East Antarctic regions at different evolutional stages, compiled by the author, are presented for discussion.

scholarly journals Some Aspects of the Cenozoic Glaciation of Southern Victoria Land, Antarctica

1983 ◽  
Vol 29 (102) ◽  
pp. 343-349 ◽  
Author(s):  
Howard Brady ◽  
Barrie McKelvey
Keyword(s):  
Middle Miocene ◽  
Ice Sheet ◽  
Basement Complex ◽  
Antarctic Ice Sheet ◽  
Victoria Land ◽  
Transantarctic Mountains ◽  
East Antarctic Ice Sheet

AbstractPalaeoglacial evidence at three sites in southern Victoria Land has been examined to consider the possible uplift of the Transantarctic Mountains through the East Antarctic ice sheet prior to the Middle Miocene. A Cenozoic tillite at Mount Feather and a striated pavement at Mount Brooke pre-date uplift. Another tillite remnant adjacent to Odell Glacier near Mount Brooke post-dates the uplift and is locally derived. This tillite, together with the Mount Feather tillite, has been previously placed in the Sirius Formation, a term that the authors abandon as it covers tillites of varying ages. Basement complex derived clasts in the Mount Feather tillite. previously reported by these authors, could be inherited from the Jurassic Mawson Formation or the Permian Metschel Tillite but they still provide evidence that the Mount Feather tillite was deposited by a regional glaciation.

Sign in / Sign up

Export Citation Format

Share Document