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The extinction of the ammonites
H102 cm W50 cm D3 cm / H40
These organisms first emerged in the fossil record during the Darriwilian stage of the Middle Ordovician period
The use of flint to make stone tools dates back millions of years
Harpoceras Ammonite | Germany Tumbled Stones The extinction of the ammonitesHarpoceras sp. Early Jurassic (180 MYO) Posidonia Shale Holzmaden, Germany Ammonite approx. size: 8. 5" x 7" Plate approx. size: 13. 5" x 10. 25" This Harpoceras ammonite from the Posidonia Shale in Holzmaden, Germany has been compressed on black slate and is partially pyritized. Ammonoids are a group of extinct marine mollusk animals in the subclass Ammonoidea of the class Cephalopoda. These mollusks, commonly referred to as ammonites, are more
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