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Potential and pitfalls of orbital tuning of loess sequences across Eurasia

Abstract

An understanding of the spatio-temporal evolution of Eurasian climate through the Quaternary requires comparable datasets as a very basic prerequisite.

Here the standing inconsistency of time scales of Eurasian loess is initially outlined; numerous authors interpret soil formation phases in Eurasia in different ways, leading to different timing of related soil formations. Based on this issue, a personal view on the challenge of obtaining correlative age models with highlight on MIS 3 is given, and suggestions for a correlative age model based on northern hemisphere reference records are made. Ice models (as e.g. the Imbrie & Imbrie 1980 model) can explain several features seen in loess records, which deviate from most marine records and insolation. Using a combination of marine data and the Imbrie & Imbrie 1980 ice model, a proposal for the time scale of magnetic enhancement in loess-paleosol sequences is given. It needs to be noted that although such a correlation is useful for most records, but exceptions may exist especially for the timing of the S1 roughly related to MIS 5.

Bibliography

Zeeden, C., Hambach, U., Obreht, I., Bösken, J., Veres, D., Lehmkuhl, F. (2017): Potential and pitfalls of orbital tuning of loess sequences across Eurasia. 4th Central European Geomorphology Conference, 9.-11.10.2017, Bayreuth, Germany

Authors Zeeden, Christian and Hambach, Ulrich and Obreht, Igor and Bösken, Janina and Veres, Daniel and Lehmkuhl, Frank
Type poster
Title Potential and pitfalls of orbital tuning of loess sequences across Eurasia
Year 2017
Address Bayreuth, Germany
Organization 4th Central European Geomorphology Conference, 9.-11.10.2017
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