We present new OSL dating results, which allows specifying the age of the Chibitsky glaciation in the Altai Mountains. Three dates were obtained from the upper part of the lacustrine-glacial Baratal sands, logically distributed within the chronological interval from 21.0 to 14.4 ka. Fluvioglacial sands from the drift moraines of the last Kuekhtanar glacier correlate with the Baratal limnoglacial, from which three OSL ages were obtained within the range of 30-24 ka. The age of the Sukorski sands, associated with the Sukorski landslide, which blocked the Chuya river valley, has been defined. According to eight OSL dates, the dammed Sukorskoye Lake existed in the interval from 16.2 to 11.2 ka. Luminescence chronology allows a more reliable reconstruction of Chibitsky glaciation age and position of the corresponding sediments in the Quaternary stratigraphic chart of the Altai-Sayan mountainous region, as corresponding to the LGM and the fourth stage of the Upper Neopleistocene of the Russian stratigraphic chart.
