The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica
In the Amery Oasis of the northern Prince Charles Mountains, the glaciomarine Bardin Bluffs Formation of the Pagodroma Group was deposited between the Late Pliocene (< 3.1 Ma) and Early Pleistocene (> 1 Ma). The formation provides evidence of (i) a reduced East Antarctic ice sheet compared to...
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British Antarctic Survey
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ftunivtasecite:oai:ecite.utas.edu.au:32525 2023-05-15T13:22:09+02:00 The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica Whitehead, JM McKelvey, BC 2001 https://doi.org/10.1017/S0954102001000128 http://ecite.utas.edu.au/32525 en eng British Antarctic Survey http://dx.doi.org/10.1017/S0954102001000128 Whitehead, JM and McKelvey, BC, The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica, Antarctic Science, 13, (1) pp. 79-86. ISSN 0954-1020 (2001) [Refereed Article] http://ecite.utas.edu.au/32525 Earth Sciences Geology Sedimentology Refereed Article PeerReviewed 2001 ftunivtasecite https://doi.org/10.1017/S0954102001000128 2019-12-13T21:11:48Z In the Amery Oasis of the northern Prince Charles Mountains, the glaciomarine Bardin Bluffs Formation of the Pagodroma Group was deposited between the Late Pliocene (< 3.1 Ma) and Early Pleistocene (> 1 Ma). The formation provides evidence of (i) a reduced East Antarctic ice sheet compared to that of the present day and (ii) a subsequent Plio-Pleistocene ice sheet expansion. The formation consists of two members. The older, basal Member 1 is c. 12.5 m thick and consists of relatively ice-distal silty, sandy and sparsely fossiliferous fjordal strata. Member 1 reflects largely ice-free marine sedimentation c. 250 km inland from the current Amery Ice Shelf edge. The member is restricted to the area about the north-eastern end of Pagodroma Gorge where it infills a chemically weathered erosion surface, cut in the form of a valley on the Permo-Triassic Amery Group. Weathering occurred during aerial exposure of the Amery Oasis in a warmer climate than that of today. The younger Member 2 exceeds 40 m in thickness and is made up of coarse ice proximal glaciomarine diamicts. It overlies disconformably Member 1 at Pagodroma Gorge. Elsewhere, Member 2 rests directly upon a smoothed and striated erosion surface, cut on the Amery Group, which was part of a fjord floor. This erosional surface and the facies contrast between the two members, indicates an East Antarctic Ice Sheet expansion and Lambert Glacier grounding-line advance. Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctic Antarctic Science Antarctica Ice Sheet Ice Shelf Lambert Glacier Prince Charles Mountains eCite UTAS (University of Tasmania) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) Antarctic Bardin Bluffs ENVELOPE(68.133,68.133,-70.819,-70.819) East Antarctic Ice Sheet Lambert Glacier ENVELOPE(67.490,67.490,-73.065,-73.065) Pagodroma Gorge ENVELOPE(68.133,68.133,-70.833,-70.833) Prince Charles Mountains ENVELOPE(67.246,67.246,-71.427,-71.427) Antarctic Science 13 1 79 86 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Sedimentology |
spellingShingle |
Earth Sciences Geology Sedimentology Whitehead, JM McKelvey, BC The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica |
topic_facet |
Earth Sciences Geology Sedimentology |
description |
In the Amery Oasis of the northern Prince Charles Mountains, the glaciomarine Bardin Bluffs Formation of the Pagodroma Group was deposited between the Late Pliocene (< 3.1 Ma) and Early Pleistocene (> 1 Ma). The formation provides evidence of (i) a reduced East Antarctic ice sheet compared to that of the present day and (ii) a subsequent Plio-Pleistocene ice sheet expansion. The formation consists of two members. The older, basal Member 1 is c. 12.5 m thick and consists of relatively ice-distal silty, sandy and sparsely fossiliferous fjordal strata. Member 1 reflects largely ice-free marine sedimentation c. 250 km inland from the current Amery Ice Shelf edge. The member is restricted to the area about the north-eastern end of Pagodroma Gorge where it infills a chemically weathered erosion surface, cut in the form of a valley on the Permo-Triassic Amery Group. Weathering occurred during aerial exposure of the Amery Oasis in a warmer climate than that of today. The younger Member 2 exceeds 40 m in thickness and is made up of coarse ice proximal glaciomarine diamicts. It overlies disconformably Member 1 at Pagodroma Gorge. Elsewhere, Member 2 rests directly upon a smoothed and striated erosion surface, cut on the Amery Group, which was part of a fjord floor. This erosional surface and the facies contrast between the two members, indicates an East Antarctic Ice Sheet expansion and Lambert Glacier grounding-line advance. |
format |
Article in Journal/Newspaper |
author |
Whitehead, JM McKelvey, BC |
author_facet |
Whitehead, JM McKelvey, BC |
author_sort |
Whitehead, JM |
title |
The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica |
title_short |
The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica |
title_full |
The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica |
title_fullStr |
The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica |
title_full_unstemmed |
The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica |
title_sort |
stratigraphy of the pliocene-lower pleistocene bardin bluffs formation, amery oasis, northern prince charles mountains, antarctica |
publisher |
British Antarctic Survey |
publishDate |
2001 |
url |
https://doi.org/10.1017/S0954102001000128 http://ecite.utas.edu.au/32525 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) ENVELOPE(68.133,68.133,-70.819,-70.819) ENVELOPE(67.490,67.490,-73.065,-73.065) ENVELOPE(68.133,68.133,-70.833,-70.833) ENVELOPE(67.246,67.246,-71.427,-71.427) |
geographic |
Amery Amery Ice Shelf Antarctic Bardin Bluffs East Antarctic Ice Sheet Lambert Glacier Pagodroma Gorge Prince Charles Mountains |
geographic_facet |
Amery Amery Ice Shelf Antarctic Bardin Bluffs East Antarctic Ice Sheet Lambert Glacier Pagodroma Gorge Prince Charles Mountains |
genre |
Amery Ice Shelf Antarc* Antarctic Antarctic Science Antarctica Ice Sheet Ice Shelf Lambert Glacier Prince Charles Mountains |
genre_facet |
Amery Ice Shelf Antarc* Antarctic Antarctic Science Antarctica Ice Sheet Ice Shelf Lambert Glacier Prince Charles Mountains |
op_relation |
http://dx.doi.org/10.1017/S0954102001000128 Whitehead, JM and McKelvey, BC, The stratigraphy of the Pliocene-lower Pleistocene Bardin Bluffs Formation, Amery Oasis, northern Prince Charles Mountains, Antarctica, Antarctic Science, 13, (1) pp. 79-86. ISSN 0954-1020 (2001) [Refereed Article] http://ecite.utas.edu.au/32525 |
op_doi |
https://doi.org/10.1017/S0954102001000128 |
container_title |
Antarctic Science |
container_volume |
13 |
container_issue |
1 |
container_start_page |
79 |
op_container_end_page |
86 |
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1766363533614776320 |