アルダン川
The Dyuktai culture, near Dyuktai Cave, on the Aldan River at 59°N, is similar to southern Siberian sites and includes the wedge-shaped cores and microblades, along with some bifacial tools, burins, and scrapers. The site likely represents the material remains of the people who spread across the Bering Land Bridge and into the New World. Around 12,000 years ago, the Sumnagin culture appears over large portions of northern and eastern Siberia. The sites are small and yield few artifacts of small blades struck off thin cylindrical cores. Bone tools and fishing equipment are absent.