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Ammonite Fossil |
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| Now extinct, the ammonite mollusk was a shelled cephalopod, usually appearing in a coiled, spiral shape. The extinction of ammonites coincided with the extinction of dinosaurs. Ammonites inhabited the world’s oceans and now appear as fossils in marine rocks. Because of their rapid evolution and wide distribution, ammonite fossils provide a useful tool for indexing and dating rocks. | ||||||
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| Jonathan Blair/Woodfin Camp and Associates, Inc. | ||||||
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| Appears in these articles: | ||||||
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| Extinction (biology); Comparative Anatomy; Cephalopod; Paleontology; Evolution; Ammonite (mollusk) | ||||||
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