Geometry of T1 and post-T1 terraces and apparent luminescence ages. Blue line and shading show the cumulative area of post-T1 and T1 terrace remnant treads for relative elevation increments of 5 m. Terraces below 70 m are post-T1. Symbols indicate dating results for T1 (triangles) and post-T1 (diamonds). (A) pIRIR single-grain dating results. Red symbols are BS MAM (solid) and CAM (open) apparent ages. Orange symbols show the percentage of saturated grains in the samples (see Methods). (B) Multi-grain MAAD apparent ages (yellow). Single-grain BS MAM ages (red solid symbols) are also shown for comparison. Green stars indicate age of synthetic multigrain samples (see text).