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Astronomically calibrating early Ediacaran evolution

Author

Listed:
  • Tan Zhang

    (Chengdu University of Technology
    Chengdu University of Technology
    China University of Geosciences (Beijing))

  • Chao Ma

    (Chengdu University of Technology
    Chengdu University of Technology)

  • Yifan Li

    (China University of Geosciences (Beijing))

  • Chao Li

    (Chengdu University of Technology)

  • Anne-Christine Silva

    (Sart Tilman B20)

  • Tailiang Fan

    (China University of Geosciences (Beijing))

  • Qi Gao

    (Chengdu University of Technology)

  • Mingzhi Kuang

    (Chengdu University of Technology)

  • Wangwei Liu

    (SINOPEC)

  • Mingsong Li

    (Peking University)

  • Mingcai Hou

    (Chengdu University of Technology
    Chengdu University of Technology)

Abstract

The current low-resolution chronostratigraphic framework for the early Ediacaran Period hampers a comprehensive understanding of potential trigger mechanisms for environmental upheavals and their connections to evolutionary innovation. Here, we establish a high-resolution astrochronological framework spanning ~57.6 million years of the early Ediacaran, anchored by the radioisotopic date of the Gaskiers glaciation onset, based on key sections from South China. Constrained by multiple radioisotopic dates, this framework precisely constrains the timing of the Marinoan deglaciation, Ediacaran Negative carbon isotope excursions 1 and 2 (EN1 and EN2), and key fossil assemblages (acanthomorphic acritarchs, Weng’an and Lantian biotas). These dates indicate the rapid termination of the Marinoan glaciation in South China within 106-107 years, while providing robust temporal evidence for the global synchroneity of EN1, EN2, and Marinoan deglaciation. The integrated chronology refines the age model for early Ediacaran biotic evolution, revealing that ecosystems gradually increased in complexity over multi-million-year timescales while global taxonomic diversity remained relatively stable, punctuated by rapid transitions to novel communities coinciding with biogeochemical perturbations.

Suggested Citation

  • Tan Zhang & Chao Ma & Yifan Li & Chao Li & Anne-Christine Silva & Tailiang Fan & Qi Gao & Mingzhi Kuang & Wangwei Liu & Mingsong Li & Mingcai Hou, 2025. "Astronomically calibrating early Ediacaran evolution," Nature Communications, Nature, vol. 16(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-57201-1
    DOI: 10.1038/s41467-025-57201-1
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    References listed on IDEAS

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