OSL,), and the analytical choice to reconstruct the evolution
through time of the ambient dose rate. Nevertheless, it
provides a reliable frame allowing comparisons with speleothem or ice-core chronologies (Lang et al. (2003); Fuchs
et al. (2013); Rousseau et al. (2013)).
14 C is limited by its 50–0 kyr range and by the fact that
reliable supports such as charcoal or wood are rare in loess
sequences. Trials on ubiquitous supports (loess OM bulk
(Hatté et al. (2001b)) and alkane (Häggi (2014)) were not that
conclusive, highly dependent on the status of the loess section studied and on the cleaning method of the outcrop. Even
in the best conditions, they show poor reliability around
(paleo) soil. However, the
14 C dates obtained from the calcitic earthworm granules allow perfect dating of the various
paleosols (embryonic soils, tundra gleys and arctic brown
paleosols) from which they are collected, as was recently
demonstrated in the Nussloch sequence (Fig. 13.8) (Moine
et al. (2017)). This new approach opens the door to precise
and independent chronologies of loess sequences.
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