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Related articles:
Cretaceous
Nautilus
Mollusca
Cephalopod
Geologic time scale
Fossil
Amun
Iridescence
Key terms: ammonites shell fossils forms cretaceous species jurassic coil upper rocks ink soft plates chamber septa animal occur org ammonoidea shape genus clay extinction cephalopod preserved diameter nautilus survived monks horns iridescent neale suborders rarely subclass specimen treatise variation operculum ammonite fossil mesozoic resemble seafloor gastropod been found centimetres ammonite shells pierre shale body chamber jurassic to upper cretaceous Search external links cited by footnotes on Wikipedia page Ammonite: |
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