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Hadrynian  

Definition

  • The Hadrynian is an Upper Proterozoic series and tectonic cycle of the Canadian Shield, above the Helikian (1000 Ma) and below the Georgian. (Adapted from: Moureau M. & Brace G. (2000). Comprehensive Dictionary of Earth Science - Dictionnaire des Sciences de la Terre. Paris, Technip.)

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http://data.loterre.fr/ark:/67375/QX8-QND7R4C4-X

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