Abstract
The Cretaceous/Tertiary boundary has been identified in the Gosau beds (Elendgraben) near Salzburg, Austria. The undisturbed 2-mm thick boundary clay in the palaeomagnetic G− zone differs from the surrounding sediments in having significant colour, no biogenic calcite and different contents of rare-earth and siderophile elements, carbon and magnetic minerals. The clay also contains shocked quartz and plagioclase particles, and indicates a dramatic change in sedimentation caused by a short-lived event.
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