Description
Grewingkia rustica Horn Coral Fossils from the upper Ordovician Period. That makes it about 450 million years old. It is at least 1.5 inches long with the classic cone shape. Horn Corals are from the extinct order of corals called Rugosa. Rugose means wrinkled. The outside of these corals have a wrinkled appearance. Horn Coral grows in a long cone shape like a bulls horn. The fossil is the skeleton of the coral animal or polyp. The animal lived at the top of the cone. They had many tentacles sticking out to gather food. The tentacles gave the horn coral a flower like appearance. This horn coral came from Spencer County, Kentucky.
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