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4th Central European Geomorphology Conference

October 9-13, 2017, University of Bayreuth, Germany

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Potential and pitfalls of orbital tuning of loess sequences across Eurasia

Christian Zeeden1, Ulrich Hambach2, Igor Obreht3, Janina Bösken3, Daniel Veres4, Frank Lehmkuhl3
1 IMCCE, Observatoire de Paris
2 BayCEER & Chair of Geomorphology, University of Bayreuth, Germany; Chair of Physical Geography, Faculty of Sciences, University of Novi Sad, Serbia
3 Department of Geography, RWTH Aachen University, Germany
4 Institute of Speleology, Romanian Academy, Cluj-Napoca, Romania; Interdisciplinary Research Institute on Bio-Nano-Science of Babes-Bolyai University, Cluj-Napoca, Romania

P 4.12 in Glaciations and periglacial: shaping the earth’s surface and feedbacks with the lithosphere and the asthenosphere

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.

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