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Divers Uncover 8,500-Year-Old Coastal Settlement Off Denmark

The EU-funded mapping effort uses tree-ring dating to fix when coastal forests drowned, helping chart the pace of sea-level rise.

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Dendrochronologist Jonas Ogdal Jensen looks at a suspected Stone Age tree trunk, unearthed at an 8,500-year-old coastal settlement submerged in his lab at Moesgaard Museum in Aarhus, Denmark. Aug.18, 2025. (AP Photo/James Brooks)
Underwater archaeologist Peter Moe Astrup inspects a tiny animal bone, unearthed at an 8,500-year-old Stone Age coastal settlement submerged by sea level rise in Bay of Aarhus in Aarhus, Denmark. Aug.18, 2025. (AP Photo/James Brooks)
A suspected Stone Age tree trunk, unearthed at an 8,500-year-old coastal settlement submerged by sea level rise in the Bay of Aarhus Aarhus Denmark. Aug.18, 2025. (AP Photo/James Brooks)

Overview

  • Divers working about 8 meters below the surface in the Bay of Aarhus opened roughly a 40-square-meter trench at a Mesolithic shoreline site.
  • Early finds include animal bones, stone tools and arrowheads, a seal tooth, and worked wood preserved in oxygen-poor seabed sediments.
  • Analysis of submerged tree stumps aims to refine timelines that indicate sea levels were rising by about 2 meters per century around 8,500 years ago.
  • The excavation is part of a €13.2 million, six-year European Union project involving Moesgaard Museum, the University of Bradford, and Germany’s Lower Saxony Institute for Historical Coastal Research.
  • Further fieldwork is planned off Germany and at two North Sea locations to map additional submerged landscapes before offshore infrastructure expands.