Optically stimulated luminescence (OSL) from quartz is now widely applied to the dating of
Quaternary sediments. Unfortunately, quartz OSL ages are often limited to 100–200ka by the
saturation level of the dose–response curve (∼ 300Gy), unless the annual dose from the
surrounding sediments is sufficiently low. Quartz thermoluminescence (TL) has been used in
the past to date beyond this range, but this signal is no longer widely employed because of
the poor reproducibility obtained from multiple-aliquot procedures, and because of the …