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  • Pyroclastic material from t...
    Chlebowski, Roman; Wierzbowski, Andrzej

    Polar research, 19/1/1/, Letnik: 1, Številka: 1
    Journal Article

    Pyroclastic material of a rhyolite type is present in some thin layers in the upper part of the De Geerdalen Formation in the Sassenfjorden area. This is the first evidence of late Triassic (Norian.Rhaetian) volcanic activity in Svalbard.