Holocene isostasy and late Cenozoic development of landforms including Beaver and Radok Lake basins in the Amery Oasis, Prince Charles Mountains, Antarctica
Geomorphological observations show no detectable uplift (i.e. falling relative sea level) of Amery Oasis since the establishment of relatively stable sea level during the mid-Holocene. The observations around the basin of Beaver Lake include an absence of raised shoreline features, the presence down...
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Online Access: | http://dx.doi.org/10.1017/s0954102097000382 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000382 |
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crcambridgeupr:10.1017/s0954102097000382 2024-03-03T08:37:23+00:00 Holocene isostasy and late Cenozoic development of landforms including Beaver and Radok Lake basins in the Amery Oasis, Prince Charles Mountains, Antarctica Adamson, D.A. Mabin, M.C.G. Luly, J.G. 1997 http://dx.doi.org/10.1017/s0954102097000382 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000382 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 9, issue 3, page 299-306 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1997 crcambridgeupr https://doi.org/10.1017/s0954102097000382 2024-02-08T08:33:50Z Geomorphological observations show no detectable uplift (i.e. falling relative sea level) of Amery Oasis since the establishment of relatively stable sea level during the mid-Holocene. The observations around the basin of Beaver Lake include an absence of raised shoreline features, the presence down to the present tidal limit of in situ ventifacts and residual landforms, the cliffed southern shoreline and adjacent shallow subhorizontal floor of Beaver Lake, and the composition of recent moraines on the basin's north eastern edge. This lack of Holocene uplift is consistent with low uplift rates observed from coastal oases of East Antarctica and suggests minor, rather than major, changes to the Antarctic ice sheet during the most recent Quaternary glacial cycle. The formation of Beaver basin is attributed to late Cenozoic glacial excavation by south flowing ice of the palaeo-Nemesis Glacier, initially eroding when relative sea level was higher than it is today. The basin containing Radok Lake was excavated by the palaeo-Battye Glacier probably when most effective during the numerous long cold periods of the late Cenozoic. The field evidence from landforms and the presence of marine fossil deposits suggests Amery Oasis was not overrun by erosive ice since at least the Pliocene, major ice streams such as Lambert Glacier flowing then, as now, around the oasis. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica Battye Glacier East Antarctica Ice Sheet Lambert Glacier Prince Charles Mountains Cambridge University Press Antarctic The Antarctic East Antarctica Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Prince Charles Mountains ENVELOPE(67.246,67.246,-71.427,-71.427) Lambert Glacier ENVELOPE(67.490,67.490,-73.065,-73.065) Beaver Lake ENVELOPE(68.295,68.295,-70.793,-70.793) Radok Lake ENVELOPE(68.000,68.000,-70.867,-70.867) Battye Glacier ENVELOPE(67.900,67.900,-70.867,-70.867) Nemesis Glacier ENVELOPE(67.250,67.250,-70.583,-70.583) Antarctic Science 9 3 299 306 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Adamson, D.A. Mabin, M.C.G. Luly, J.G. Holocene isostasy and late Cenozoic development of landforms including Beaver and Radok Lake basins in the Amery Oasis, Prince Charles Mountains, Antarctica |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Geomorphological observations show no detectable uplift (i.e. falling relative sea level) of Amery Oasis since the establishment of relatively stable sea level during the mid-Holocene. The observations around the basin of Beaver Lake include an absence of raised shoreline features, the presence down to the present tidal limit of in situ ventifacts and residual landforms, the cliffed southern shoreline and adjacent shallow subhorizontal floor of Beaver Lake, and the composition of recent moraines on the basin's north eastern edge. This lack of Holocene uplift is consistent with low uplift rates observed from coastal oases of East Antarctica and suggests minor, rather than major, changes to the Antarctic ice sheet during the most recent Quaternary glacial cycle. The formation of Beaver basin is attributed to late Cenozoic glacial excavation by south flowing ice of the palaeo-Nemesis Glacier, initially eroding when relative sea level was higher than it is today. The basin containing Radok Lake was excavated by the palaeo-Battye Glacier probably when most effective during the numerous long cold periods of the late Cenozoic. The field evidence from landforms and the presence of marine fossil deposits suggests Amery Oasis was not overrun by erosive ice since at least the Pliocene, major ice streams such as Lambert Glacier flowing then, as now, around the oasis. |
format |
Article in Journal/Newspaper |
author |
Adamson, D.A. Mabin, M.C.G. Luly, J.G. |
author_facet |
Adamson, D.A. Mabin, M.C.G. Luly, J.G. |
author_sort |
Adamson, D.A. |
title |
Holocene isostasy and late Cenozoic development of landforms including Beaver and Radok Lake basins in the Amery Oasis, Prince Charles Mountains, Antarctica |
title_short |
Holocene isostasy and late Cenozoic development of landforms including Beaver and Radok Lake basins in the Amery Oasis, Prince Charles Mountains, Antarctica |
title_full |
Holocene isostasy and late Cenozoic development of landforms including Beaver and Radok Lake basins in the Amery Oasis, Prince Charles Mountains, Antarctica |
title_fullStr |
Holocene isostasy and late Cenozoic development of landforms including Beaver and Radok Lake basins in the Amery Oasis, Prince Charles Mountains, Antarctica |
title_full_unstemmed |
Holocene isostasy and late Cenozoic development of landforms including Beaver and Radok Lake basins in the Amery Oasis, Prince Charles Mountains, Antarctica |
title_sort |
holocene isostasy and late cenozoic development of landforms including beaver and radok lake basins in the amery oasis, prince charles mountains, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1017/s0954102097000382 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000382 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(67.246,67.246,-71.427,-71.427) ENVELOPE(67.490,67.490,-73.065,-73.065) ENVELOPE(68.295,68.295,-70.793,-70.793) ENVELOPE(68.000,68.000,-70.867,-70.867) ENVELOPE(67.900,67.900,-70.867,-70.867) ENVELOPE(67.250,67.250,-70.583,-70.583) |
geographic |
Antarctic The Antarctic East Antarctica Amery Prince Charles Mountains Lambert Glacier Beaver Lake Radok Lake Battye Glacier Nemesis Glacier |
geographic_facet |
Antarctic The Antarctic East Antarctica Amery Prince Charles Mountains Lambert Glacier Beaver Lake Radok Lake Battye Glacier Nemesis Glacier |
genre |
Antarc* Antarctic Antarctic Science Antarctica Battye Glacier East Antarctica Ice Sheet Lambert Glacier Prince Charles Mountains |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica Battye Glacier East Antarctica Ice Sheet Lambert Glacier Prince Charles Mountains |
op_source |
Antarctic Science volume 9, issue 3, page 299-306 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102097000382 |
container_title |
Antarctic Science |
container_volume |
9 |
container_issue |
3 |
container_start_page |
299 |
op_container_end_page |
306 |
_version_ |
1792498526795595776 |