We have obtained more than 30 radiothermoluminiscence (RTL) dates for loose sediments from the Tunka Rift, divided by lithology into sandy, boulder-pebble, terrace, slope, and cover formations. The sandy fluvial sediments are dated to 76.00-31.50 ka, and the eolian sediments formed from them, to 16.12-8.31 ka. We have first determined the age of the Mondy moraine in the west of the Tunka Rift -
... [Show full abstract] 70.00-72.00 ka. The age of the ancient alluvium buried under it varies from 101.5 to 132 ka. The oldest sediments of this complex (153 ka?) occur in the base of the ancient alluvium of the Ikhe-Ukhgun' River, at its intersection with the Nilovskii spur. Radiocarbon and RTL dates obtained for the base of the lower terraces of the Irkut River made up of Holocene deposits yield an age of 53.40 and 40.06 ka, respectively. The lower part of the slope sediments is dated to 22.00 ka, and the pebbles overlapping the bases and slopes of young volcanoes in the Tunka basin, to 39.00 and 70.00 ka, respectively.