Figure 14

Bayesian analyses to test the utility of YDB Pt peak in Paleo Unit 23 (PU23). Age-depth model using 3 OSL dates (black text; Table 1, Fig. 7), the Pt peak (green text and arrow), and the cultural age ranges of 3 culturally identifiable lithic artifacts (orange text; Fig. 7). The Pt peak’s chronostratigraphic position is statistically supported with a high Agreement Index of 95 (lower limit ≥ 60), confirming its utility as a chronostratigraphic marker.