File:Arietenpflaster Steinlach-Ofterdingen Ammoniten Baden-Wuerttemberg.jpg

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Deutsch: "Schneckenpflaster an der Steinlach", Ofterdingen", im Bachbett der Steinlach, Baden-Württemberg, geschützt als Naturdenkmal. Es handelt sich um Ammoniten (Ammonoidea), eine sehr artenreiche Teilgruppe der ausschließlich marin lebenden Kopffüßer. Sie liegen in der Arietenkalk-Formation (Unterjuraschicht Lias alpha3, Alter <200 Ma). Es sind Verwandte von Tintenfischen, die jedoch schon am Ende der Kreidezeit (>65 Ma) ausgestorben sind. Die eindrucksvolle Anhäufung geht auf nachträgliche Zusammenschwemmung im bewegten Flachmeer zurück. Eine ähnliche Anhäufung aus der gleichen Gesteinsschicht bei Bodelshausen (5,3 km) findet sich als große Gesteinsplatte in der Paläontologischen Sammlung der Universität Tübingen.

English: "Arietenpflaster von Ofterdingen" (near Tübingen), in the streambed of the Steinlach, protected as a Naturschutzgebiet. These are Ammonites, an extinct group of marine invertebrate animals in the class Cephalopoda, here found in Early Jurassic ("Arietenkalk-Formation" Lias alpha3, age <200 Ma. The accumulation of Ammonites is a result of natural flows in a flat marine sea. Another, even more impressive accumulation is preserved as a huge stoneplate, "Arietenpflaster von Bodelshausen", in the Paleontological Collection of the University of Tübingen.
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current21:56, 10 June 2015Thumbnail for version as of 21:56, 10 June 20151,800 × 1,200 (2.59 MB)Ustill (talk | contribs)User created page with UploadWizard

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