We welcome Phillips et al.'s (2000) study, which substantiates previous evidence for glaciation during global interstadials in the Himalaya (Sharma and Owen, 1996; Richards et al., 2000). We were surprised, however, to read their criticism of the optically stimulated luminescence (OSL) dating of glaciogenic sediments from Swat and Nanga Parbat (Richards et al., 2000). Phillips et al. (2000) stated that the OSL ages presented by Richards et al. (2000) “require confirmation, because they employ multiple aliquot OSL methods that cannot establish the extent to which sample grains were bleached prior to burial (Clarke et...

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