File:Belemnit (Donnerkeil, Senserbach).jpg

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Deutsch: Teil des versteinerten Innenskelettes eines Belmniten. Zusammen mit vielen anderen ähnlichen Fossilien wurde das Stück im Jahr 2003 im Senserbach an der deutsch-niederländischen Grenze zwischen Vaals und Aachen gefunden.

Das Stück wog 18,4 Gramm, hat eine Länge über alles von 7,4 Zentimetern und einen größten Durchmesser von 1,3 Zentimetern.

Es wurde in kreidezeitlichen Ablagerungen gefunden. Geologisch lässt es sich dem Aachener Schichtstufenland sowie dem niederländischen Mergelland zuordnen.

Das Stück befindet sich jetzt als Lehrmaterial in der Mathe-AC Lernwerkstatt in Aachen.

Zwei weitere Bruchstücke (Rostren) wurden zwanzig Jahre später an derselben Stelle gefunden. Weitere Photos zeigen die auf Bachniveau anstehenden geologischen Lagen sowie die Fundstelle im Jahr 2023.

Quellseite: https://www.rhetos.de/html/lex/inventar_20230812_inventar_belemnit.htm
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