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2024-10-13 13:40:20

D C Fitzgerald on Nostr: Iridescent Ammonite on Matrix. Placenticeras costatum is a species of ammonite, an ...

Iridescent Ammonite on Matrix. Placenticeras costatum is a species of ammonite, an extinct group of cephalopod mollusks that lived during the Mesozoic Era. Late Cretaceous (approx. 71 million years ago). Bearpaw Formation, Alberta, Canada. #fossils #science #biology #evolution #science #mollusks #photo #nature

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