Fossil pollen, molluscs, and stable isotopes in the Dättnau valley, Switzerland
1987; Wiley; Volume: 16; Issue: 3 Linguagem: Inglês
10.1111/j.1502-3885.1987.tb00097.x
ISSN1502-3885
AutoresKlaus Félix Kaiser, Ueli Eicher,
Tópico(s)Pleistocene-Era Hominins and Archaeology
ResumoPollen and mollusc deposits in a sedimentation series laid down in the Dattnau valley during the Late Glacial and early Post‐glacial were studied. For the first time δ 13 C and δ 18 O in land‐snail shells were measured. It was possible to reconstruct vegetational and climatic developments from the Bölling ( c . 12,500 B.P.) until well into the early Boreal ( c . 9,000 B.P.). The two sets of findings agree well. The Late Glacial is seen to comprise two intervals: the continuous, locally rather moist, warm Bölling/Alleröd period, and the subsequent dry . cold Younger Dryas. The profile ceases after the changeover from the Late Glacial to the Post‐glacial. The transitions from the Alleröd to the Younger Dryas and hence to the Preboreal and Boreal are both clearly identifiable in the pollen diagram; the mollusc record, however, ceases to be interpretable shortly before the climatic change to the Post‐glacial. The δ 18 O curve shows a clear distinction between the AllerÖd and the Younger Dryas. The Gerzensee fluctuation, immediately before this transition. is evident as a negative deviation.
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