Figure 6

Paleo Unit 15 (PU15) profile at site 8WA329 showing platinum (Pt) abundance in ppb (error =  ± 0.1 ppb) (Supplementary Table 5), OSL age estimates (Table 1), and position of temporally diagnostic artifacts. Sediment zones as observed visually are indicated by color changes. ^aOSL date is from the adjacent wall of the excavation unit.