Timing of the Last-Interglacial High Sea Level on the Seychelles Islands, Indian Ocean |
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Authors: | Carsten Israelson Barbara Wohlfarth |
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Institution: | a Geological Institute, University of Copenhagen, Øster Voldgade 10, DK-1350, Copenhagen K, Denmark;b Department of Quaternary Geology, Lund University, Tornavagen 13, S-223 63, Lund, Sweden |
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Abstract: | Corals from the Seychelles Islands, Indian Ocean, occur mainly as small coralline algae–vermetid remnants found in cavities adhering to the rock surface, and they rarely attain more than 2 m2in area. Samples ofGoniastreaandPoritesfrom elevations between 1.7 and 6 m above present mean sea level were dated by TIMS238U–234U–230Th techniques. The ages from well-preserved corals lie between 131,000 and 122,000 yr B.P., in agreement with most other observations of the last-interglacial sea level. Field evidence and dating from high marine limestones from two sections at La Digue Island indicate a period of coral buildup until 131,000 yr B.P., followed by a drop in sea level between 131,000 and 122,000 yr B.P. |
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Keywords: | last interglaciation sea level U– Th dating corals Seychelles Indian Ocean |
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