Fig. 2.
Summary of dating results for the silty ice from Dye 3. From top to bottom, the bars indicate: maximum likelihood estimates for the branch length of the invertebrate COI sequences (COI); amino acid racemization results using alternative activation energies, models of racemization behavior, and basal temperature histories (AAR); age estimate from 10Be/36Cl measurements in silty ice; minimum ages based on single grain luminescence results (OSL). The time span covered by all dating methods (450-800Ka) is marked in gray. LIG = Last Interglacial. Stippled lines represent the results of less likely models. It should be noted that the maximum age estimate for the invertebrate COI sequences is based on an unlikely slow substitution rate. For details see main text and (6).