They were formed through a geological process known as opalization, wherein organic material from ancient ammonite shells is ...

Some ammonites had long, straight shells, while others had helix-shaped shells. Most species, however, had coiled shells lined with progressively larger chambers separated by thin walls called septa.

Most ammonites died out 66 million years ago, at the same time as dinosaurs. Fossilised ammonite shells can be found all around the world, including on parts of Britain's coastline. But if you can't ...

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 ...

Named for the ancient, coiled shells that are the winery’s symbol, Ammonite is from the winery’s first vintage under the leadership of the co-founders’ two daughters, Leto Paraskevopoulou ...