This is a stunning, 15.5" long fossilized pectoral fin of a large swordfish (Protosphyraena

This is a stunning, 15.5" long fossilized pectoral fin of a large swordfish (Protosphyraena). It was collected from the Cretaceous age Smoky Hill Chalk (Niobrara Formation) in Gove County, Kansas, making this fossil approximately 83 million years old. The preservation of this fin is impressive to say the least, with fine grooves that run parallel to the edge and an posterior fin edge that resembles a serrated blade. When viewing the edge of the rock, a cross section of the swordfish can be seen within.For Sale At: https://www.fossilera.com/fossils/15-5-cretaceous-swordfish-protosphyraena-pectoral-fin-kansas -- source link

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