Chronostratigraphic research at the Tolbor-4 site (Northern Mongolia)

The study of the multilayered site of Tolbor-4 in Northern Mongolia was resumed in 2017. The works were aimed at clarifying the stratigraphy of the site using the methods of micromorphology, as well as a new cycle of radiocarbon and OSL-dating. The exposed stratigraphic profile consisted of six lithological layers. One unit comprising layers 1-4 contained the complexes of the Late Upper Paleolithic. Layer 5 revealed the industries of the Initial and Early Upper Paleolithic. Two ostrich (Struthio) eggshell beads were found in layer 3. It was established that layer 4 underwent significant impact of solifluctional processes, and layer 5 was accumulated under much more stable depositional conditions.