Holocene lake sediments and sea-level change at Mt. Riiser-Larsen
At sites where glacio-isostatic rebound has occurred, the record of sea-level change can be used to infer the former ice thickness and its melting history At Mt Riiser-Larsen, former sea-levels higher than present are indicated by the presence of raised beach deposits and ancient sediments deposited...
| Main Authors: | , , , |
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| Format: | Report |
| Language: | English |
| Published: |
Research School of Earth Sciences, The Australian National University/National Institute of Polar Research/Department of Socio-geographical and Environmental Studies, Nara Women's University/National Institute of Polar Research
1998
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| Subjects: | |
| Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3032 http://id.nii.ac.jp/1291/00003032/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3032&item_no=1&attribute_id=18&file_no=1 |
| Summary: | At sites where glacio-isostatic rebound has occurred, the record of sea-level change can be used to infer the former ice thickness and its melting history At Mt Riiser-Larsen, former sea-levels higher than present are indicated by the presence of raised beach deposits and ancient sediments deposited in brackish water Sediment cores from three ice-marginal lakes contained only fresh-water sediment, and a basal radiocarbon age shows that there has been no marine incursion in the last ～10000 years, limiting sea-level during that time to lower than 18 4m above present A well-defined marine limit is present 15 m a s 1, which will be dated using radiocarbon ages on stranded seals and abandoned penguin rookeries We anticipate an age of ～6 ka, because of the interaction between eustatic and isostatic components of sea-level change |
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