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| Titel |
A 500 kyr record of global sea-level oscillations in the Gulf of Lion, Mediterranean Sea: new insights into MIS 3 sea-level variability |
| VerfasserIn |
J. Frigola, M. Canals, I. Cacho, A. Moreno, F. J. Sierro, J. A. Flores, S. Berné, G. Jouet, B. Dennielou, G. Herrera, C. Pasqual, J. O. Grimalt, M. Galavazi, R. Schneider |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 8, no. 3 ; Nr. 8, no. 3 (2012-06-22), S.1067-1077 |
| Datensatznummer |
250005596
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| Publikation (Nr.) |
 copernicus.org/cp-8-1067-2012.pdf |
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| Zusammenfassung |
| Borehole PRGL1-4 drilled in the upper slope of the Gulf of Lion provides an
exceptional record to investigate the impact of late Pleistocene
orbitally-driven glacio-eustatic sea-level oscillations on the sedimentary
outbuilding of a river fed continental margin. High-resolution grain-size
and geochemical records supported by oxygen isotope chronostratigraphy allow
reinterpreting the last 500 ka upper slope seismostratigraphy of the Gulf of
Lion. Five main sequences, stacked during the sea-level lowering phases of
the last five glacial-interglacial 100-kyr cycles, form the upper
stratigraphic outbuilding of the continental margin. The high sensitivity of
the grain-size record down the borehole to sea-level oscillations can be
explained by the great width of the Gulf of Lion continental shelf. Sea
level driven changes in accommodation space over the shelf cyclically
modified the depositional mode of the entire margin. PRGL1-4 data also
illustrate the imprint of sea-level oscillations at millennial time-scale,
as shown for Marine Isotopic Stage 3, and provide unambiguous evidence of
relative high sea-levels at the onset of each Dansgaard-Oeschger Greenland
warm interstadial. The PRGL1-4 grain-size record represents the first
evidence for a one-to-one coupling of millennial time-scale sea-level
oscillations associated with each Dansgaard-Oeschger cycle. |
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