Marion Island volcanism and glaciation
Abstract Sub-Antarctic Marion Island was the site of extensive volcanism as well as glaciation during both the Quaternary and the Holocene. Initial reconstructions suggested a link between deglaciation and the initiation of faulting which, in turn, facilitated lava eruptions during the interglacials...
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Online Access: | http://dx.doi.org/10.1017/s0954102010000878 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102010000878 |
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crcambridgeupr:10.1017/s0954102010000878 2024-09-09T19:08:16+00:00 Marion Island volcanism and glaciation Hall, Kevin Meiklejohn, Ian Bumby, Adam 2010 http://dx.doi.org/10.1017/s0954102010000878 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102010000878 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 23, issue 2, page 155-163 ISSN 0954-1020 1365-2079 journal-article 2010 crcambridgeupr https://doi.org/10.1017/s0954102010000878 2024-06-19T04:04:30Z Abstract Sub-Antarctic Marion Island was the site of extensive volcanism as well as glaciation during both the Quaternary and the Holocene. Initial reconstructions suggested a link between deglaciation and the initiation of faulting which, in turn, facilitated lava eruptions during the interglacials. However, our reassessment of the faulting, volcanic rock, and palaeoglacier distribution indicate that these original interpretations were erroneous. Features thought to be due to faulting are shown to be erosional scarps and this significantly changes interpretations of former glacier distribution. Further, the loss of the former ice cap has revealed new information on former glaciers and their flow directions, thereby allowing reconstruction of palaeoglaciers. Our new reconstruction fits with information from invertebrate genetic mapping that suggest some lava outcrops were nunataks and, therefore, refuges during the Last Glacial period. The new findings of glacial landforms in areas previously covered by snow suggest there was a significant ice advance during the Little Ice Age. Although Holocene volcanic rocks overlie and mask much of the glacial evidence, it has been possible to develop a proposed new reconstruction for glaciation, which is presented together with some of the implications. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Ice cap Marion Island Cambridge University Press Antarctic Antarctic Science 23 2 155 163 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Sub-Antarctic Marion Island was the site of extensive volcanism as well as glaciation during both the Quaternary and the Holocene. Initial reconstructions suggested a link between deglaciation and the initiation of faulting which, in turn, facilitated lava eruptions during the interglacials. However, our reassessment of the faulting, volcanic rock, and palaeoglacier distribution indicate that these original interpretations were erroneous. Features thought to be due to faulting are shown to be erosional scarps and this significantly changes interpretations of former glacier distribution. Further, the loss of the former ice cap has revealed new information on former glaciers and their flow directions, thereby allowing reconstruction of palaeoglaciers. Our new reconstruction fits with information from invertebrate genetic mapping that suggest some lava outcrops were nunataks and, therefore, refuges during the Last Glacial period. The new findings of glacial landforms in areas previously covered by snow suggest there was a significant ice advance during the Little Ice Age. Although Holocene volcanic rocks overlie and mask much of the glacial evidence, it has been possible to develop a proposed new reconstruction for glaciation, which is presented together with some of the implications. |
format |
Article in Journal/Newspaper |
author |
Hall, Kevin Meiklejohn, Ian Bumby, Adam |
spellingShingle |
Hall, Kevin Meiklejohn, Ian Bumby, Adam Marion Island volcanism and glaciation |
author_facet |
Hall, Kevin Meiklejohn, Ian Bumby, Adam |
author_sort |
Hall, Kevin |
title |
Marion Island volcanism and glaciation |
title_short |
Marion Island volcanism and glaciation |
title_full |
Marion Island volcanism and glaciation |
title_fullStr |
Marion Island volcanism and glaciation |
title_full_unstemmed |
Marion Island volcanism and glaciation |
title_sort |
marion island volcanism and glaciation |
publisher |
Cambridge University Press (CUP) |
publishDate |
2010 |
url |
http://dx.doi.org/10.1017/s0954102010000878 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102010000878 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Science Ice cap Marion Island |
genre_facet |
Antarc* Antarctic Antarctic Science Ice cap Marion Island |
op_source |
Antarctic Science volume 23, issue 2, page 155-163 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102010000878 |
container_title |
Antarctic Science |
container_volume |
23 |
container_issue |
2 |
container_start_page |
155 |
op_container_end_page |
163 |
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1809822483903152128 |