Revisiting the Age of the Sahara Desert

In their Brevia “The age of the Sahara Desert” (10 Feb., p. 821), M. Schuster et al. state that the oldest terrestrial records for desert conditions in the Sahara are only 86 thousand years old (ka). This is not correct. For example, U/Th dating from the Eastern Sahara gives dates of >300 ka ([1