Holocene lake sediments and sea-level change at Mt. Riiser-Larsen

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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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