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Continental palaeoenvironments during MIS 2 and 3 in southwestern France: the La Ferrassie rockshelter record
Reappraisal of La Ferrassie rockshelter sequence provides novel information on the continental palaeoenvironments in southwestern France during the end of Marine Isotope Stage 3 and the beginning of MIS 2. Cycles of sedimentation and soil development have been recognised, and are tentatively interpr...
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Published in: | Quaternary science reviews 2008-11, Vol.27 (21), p.2048-2063 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Reappraisal of La Ferrassie rockshelter sequence provides novel information on the continental palaeoenvironments in southwestern France during the end of Marine Isotope Stage 3 and the beginning of MIS 2. Cycles of sedimentation and soil development have been recognised, and are tentatively interpreted as reflecting the Dansgaard/Oeschger climatic cycles. From bottom to top, the sequence shows a trend to progressive reduction in length (and/or intensity) of the soil-forming periods and conversely, an increase in frost-related processes and sedimentation. Cambisols, associated with significant clay weathering and decalcification, developed at the base of the sequence (≥35 to ∼30
14C
kyr
BP). They are then replaced by simple carbonate-rich humus horizons during the interval ∼30 to ∼28
14C
kyr
BP. At the beginning of MIS 2, the talus dynamics shifts from rockfall accumulation with intense snow-induced washing to stone-banked solifluction lobes in connection to a semi-desert-like periglacial environment. |
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ISSN: | 0277-3791 1873-457X |
DOI: | 10.1016/j.quascirev.2008.08.022 |