The “gem” of an ammonite dates back 71 million years, and comes with a curious coating of ammolite, giving it a dazzling rainbow iridescence. “A 'Gem' Ammonite in Matrix from the Bearpaw ...

Miners Looking for Ammonite Stumble on Rare Complete Fossils of 'Ocean Predators' From 100 Million Years Ago Evidence of yesteryears is always lurking inside the earth's surface. Organizations and ...

Ammonites were shelled cephalopods that died out about 66 million years ago. Fossils of them are found all around the world, sometimes in very large concentrations. The often tightly wound shells of ...