Sectioned Ammonite

Internal view of a sectioned ammonite fossil, Perisphinctes sp. from Madagascar, Jurassic Period. The view reveals the internal chambers created by the animal as it grew. In the fossil the chambers have become filled with crystallized minerals

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Ammonite Ammonoid Ammonoidea Cephalopod Cephalopoda Chambers Crystal Deposits Extinct Fossil Index Jurassic Lines Madagascar Mollusca Mollusk Paleontology Period Perisphinctes Planispiral Polished Section Sectioned Septa Septum Spiral Split Suture

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