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June 17, 2026Arctic Antarctic and Alpine ResearchOpen Access

Chronology, cryostratigraphy, and palaeoenvironmental evidence from the CRREL Permafrost Tunnel, Alaska

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Authors

AMAlistair MonteathSCScott L. CockerTDThomas A. Douglas

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Overview

Chronological and environmental data reveal significant changes in Alaska's permafrost landscape.

Key Points

  • The study aims to analyze chronologies and palaeoenvironmental records to understand Yedoma permafrost.
  • Utilized cryostratigraphy and stable isotopic analyses from eight tunnel exposures.
  • Developed a sedimentary history combining new data with previous studies.
  • Investigated changes in silt accumulation and associated environmental conditions over time.
  • Fox Gravels dated to ~45,000 cal yr BP, followed by silt accumulation starting ~43,000 cal yr BP.
  • Hiatus in silt accumulation around 36,000 cal yr BP correlated with higher pore ice δ18O values.
  • Evidence indicates a shift from shrub tundra to herbs and sedges by 36,000 cal yr BP as the Bering Land Bridge formed.

Cite This Study

Monteath et al. (2026) studied this question.

synapsesocial.com/papers/6a323bbcd50b63ecad20626chttps://doi.org/10.1080/15230430.2026.2677383
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