Impact and Aftermath Preserved in Stone (1 of 2) (IMAGE)

GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre

Impact and Aftermath Preserved in Stone (1 of 2)

Caption

The picture shows the Cretaceous-Palaeogene boundary at Geulhemmerberg in the Netherlands, where the boundary clay samples were taken. The event bed is clearly visible as a grey clay-rich layer, between the otherwise yellowish carbonate sediments. It was thought to have been laid down during calm periods between strong storm events.

Credit

Michael Henehan

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