![]() ![]() they have a worldwide geographical distribution.they are relatively common and reasonably easy to identify.they are found in many types of marine sedimentary rocks.they evolved rapidly so that each ammonite species has a relatively short life span.stands in the LWL-Museum of Natural History in MünsterĪmmonites make excellent guide fossils for stratigraphy because: Parapuzosia seppenradensis, biggest known ammonite, diameter 1.80 m. The original is standing in the foyer of the "LWL-Museum für Naturkunde" in Münster (the coordinate of this cache) and it´s the logo of the museum. Many replicas of this Ammonite are standing in various museum around the world and in the town, where it was found (Seppenrade, near Münster, North Germany). The smaller earlier segments were walled off and the animal could maintain its buoyancy by filling them with gas. The soft body of the creature occupied the largest segments of the shell at the end of the coil. Their name came from their spiral shape somewhat resemble tightly-coiled rams horns like the egyptian godhood Ammon. ![]() ![]() Today living near relatives are coleoids, squid, octopus, and cuttlefish. They lives from the Devonian until Late Cretaceous (417 - 65 million years ago) all over the world. Parapuzosia seppenradensis, biggest known ammonite, diameter 1.80 m.Īmmonites are an extinct group of marine animals belonging to the cephalopod subclass Ammonoidea. Therefore the ammonites are very importent for geology. They are main index fossils, and it is often possible to link the rock layer in which they are found to specific geological time periods. ![]()
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