New Paleolithic complexes in the Osa and Obusa river valleys (Irkutsk region)

We present here the results of our work in the Osa district of Irkutsk region in 2014-2015 years. We found 8 Paleolithic complexes in the Osa and Obusa river valleys and identify as the stratified complexes and well as the artifact concentrations exposed on the surface of “mountains” and anthropogenic beaches on the Osa gulf of the Bratsk reservoir. Nizhny Gorkhon, Kutanka-2, Yenisei sites are the stratified complexes. The Late Sartan complex of Nizhny Gorkhon site contained the only one flake, but solifluction unit of the Early Sartan age included 25 artifacts. We uncovered two levels of archaeological materials in Middle Sartan deposits at the Kutanka-2 site. The scraper on the decortical flake was found in the Late Karginky deposits in the Yenisei River outfall. Maisk, Uduktai, Kutanka-1, Orlok, Verkhny Gorkhon sited are the occurrences with the exposed material. The assemblage of Paleolithic artifacts with the wind carving on their surfaces, included the cores and flakes, was collected on the western slope of the Uduktai mountain. We fixed the exposed wind-carved artifacts near the backing commissure of the bench at the Verkhny Gorkhon occurrence, but no stratified materials. The test pits gave the Holocene artifacts and red deer vertebra in the Upper Neo-Pleistocene deposits at the Verkhny Gorkhon. Kutanka-1 is the occurrences with the exposed material on the left valley slope of Kutanka River. We fixed the Kakha occurrence on the right valley slope of the homonymous river, in her outfall. The Maisk site was discovered at the bench of right valley slope on the Abramovka spring. Orlok is the artificial complex, exposed on the surface of the anthropogenic beach. There was not stratified material. We suppose that Neo-Pleistocene objects of the Anagara-Osa geoarchaeological area are confined to elevated valley surface or divides.