Fossil Ammonite Seashell


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Ammonites are one of the most recognizable fossils around, this is due to their familiar spiral shape shell, reminiscent of what we know as a snail shell, though these creatures are not related to snails at all. They were marine animals, present between 240 – 65 million years ago, who had a coiled external shell similar to that of the modern nautilus, and although they resembled a modern-day nautilus, these mollusks are more closely related to living coleoids i.e. octopuses, squid, and cuttlefish.

These creatures varied in size, ranging from only a few millimeters to some fossils being found measuring a whopping 8 feet 96 inches.