13,800-Year-Old Alaskan Site Shows Trans-Beringian Cultural Connections in First Americas Settlement
Analysis of artifacts and features at an ancient Alaskan base camp reveals cultural links between Asian and American archaeological sites, potentially bridging long-standing gaps between genetic and archaeological models of human migration.
What happened
A University of Kansas-led team analyzed the Shég' Xdaltth'í' site in east-central Alaska, dated to 13,800 years ago—predating the earliest Clovis culture by hundreds of years. The site's oldest component (C1) yielded over 80,000 artifacts including a distinctive hafted-biface form, bone tools, and well-preserved features indicating sustained habitation over at least two centuries. The hafted-biface and other tools resemble those found at similarly aged sites west of the Beringia Land Bridge (closer to Asia) and at pre-Clovis and Clovis sites to the south, suggesting cultural connections across both sides of the ancient land bridge.
Context
The site lies within a region containing 19 pre-Clovis archaeological sites spread across an area the size of Maryland—the densest known concentration of such sites in the Americas. Geneticists predict that up to five human populations inhabited Beringia between 16,000 and 13,000 years ago before dispersing, but archaeologists have struggled to match these genetically inferred populations to the archaeological record's documented variability. The new findings suggest the Alaskan site functioned as a settled base camp rather than a transient waypoint, and its artifacts show characteristics shared with both trans-Beringian and temperate North American Paleoindian sites, potentially reconciling the gap between genetic models and archaeological evidence for how people first populated the Americas.
What's disputed
The broader timing and route of human entry to the Americas remains contested. While most scientists agree early migrants from Northeastern Asia passed through Beringia, some controversial evidence—including findings dating back nearly 50,000 years—suggests humans may have crossed the Pacific Ocean thousands of years earlier, further complicating the standard Beringia theory.