Titlebook: Geological and Biological Effects of Impact Events; Eric Buffetaut,Christian Koeberl Book 2002 Springer-Verlag Berlin Heidelberg 2002 Biod

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https://doi.org/10.1007/978-3-642-99491-3s, on samples obtained by a micro drilling procedure. The iridium contents of the burrow fillings vary from 50 ppt about 20 cm below the impactoclastic layer to 280 ppt within the layer, depending upon the stratigraphic level where burrowing began. The stratigraphic distribution of Ir is the result of both bioturbation and chemical diffusion.

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Effects of Bioturbation through the Late Eocene Impactoclastic Layer near Massignano, Italy,s, on samples obtained by a micro drilling procedure. The iridium contents of the burrow fillings vary from 50 ppt about 20 cm below the impactoclastic layer to 280 ppt within the layer, depending upon the stratigraphic level where burrowing began. The stratigraphic distribution of Ir is the result of both bioturbation and chemical diffusion.

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Outsourcing: Unternehmen ohne Grenzen,s of the ejecta-bearing strata of corehole 7430/10-U-01, located 30 km north-east of the Mjølnir Crater, have revealed a high abundance of marine Prasinophyceae algae (mainly .) and a minor abundance peak of freshwater algae (juvenile .). The highest concentrations of algae occur in the ejecta unit

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,Ansätze zur Gestaltung der Fertigungstiefe,an. In the Bidart section, one specimen was discovered less than five centimetres below the boundary clay layer. It contains a small, but significant amount of iridium and a few crystals of Ni-rich spinel, two markers of the K/T cosmic event. These findings support the idea that ammonites existed up

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Die strategische Ressource „Data Warehouse“zil, provides evidence supporting the interpretation that the impact of a bolide has caused the widespread biotic extinction at the end of the Cretaceous. New considerations relating to the distribution of iridium and fluorine, as well the occurrence of shocked quartz, spherules, tsunamite bed, biot