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Ancient amber may contain traces of tsunamis

  • Scientists discovered evidence of one or more ancient tsunamis in 115-million-year-old amber deposits from northern Hokkaido, Japan, published on May 15, 2025.
  • The discovery followed analysis of deformed amber-rich silica sediments formed during the Early Cretaceous, interpreted as tsunami backwash rapidly transporting tree resin offshore.
  • Supporting evidence includes flame structure deformation in amber, large plant debris on the seafloor without erosion, and signs of a contemporaneous landslide possibly triggered by an earthquake.
  • Study co-author Aya Kubota emphasized that amber provides a valuable and timely record of sedimentary processes, demonstrating its potential to uncover evidence of ancient tsunamis.
  • This research suggests that analyzing amber and terrestrial deep-sea sediments can improve identification of ancient tsunamis, which often remain difficult to distinguish from storms in the fossil record.
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Science News broke the news in United States on Thursday, May 15, 2025.
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