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Chitinozoan biostratigraphy and carbon isotope stratigraphy from the Upper Ordovician Skogerholmen Formation in the Oslo Region : a new perspective for the Hirnantian lower boundary in Baltica
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- Journal Article
- A1
- open access
The nature of Ordovician limestone-marl alternations in the Oslo-Asker District (Norway) : witnesses of primary glacio-eustasy or diagenetic rhythms?
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Chitinozoan biostratigraphy of the Upper Ordovician D. clingani and P. linearis graptolite biozones on the Island of Bornholm, Denmark