A different luminescence signal from quartz, thermally transferred OSL (TT-OSL), can date these older deposits.
OSL and TT-OSL results are combined to provide a chronology for the site.
This model highlights the important role of intrinsic meander dynamics in site formation and does not necessarily require complex interpretations that invoke periodic blocking of the Kalambo River, as has previously been suggested.
The oldest luminescence ages place the Mode 2/3 transition between ∼500 and 300 ka, consistent with other African and Asian sites where a similar transition can be found.
The study approach adopted here can potentially be applied to other fluvial Stone Age sites throughout Africa and beyond.
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