Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...

Miners Looking for Ammonite Stumble on Rare Complete Fossils of 'Ocean Predators' From 100 Million Years Ago Evidence of ...

The process of opalization refers to something turning into an opal — like for example, a big part of this fossil. Opalized ammonite fossils are formed through a unique geological process ...

But ammonites weren't reptiles: they were ocean-dwelling molluscs, specifically cephalopods. An ammonite fossil with a carved snake's head Zoë Hughes, Curator of Fossil Invertebrates at the Museum, ...

Fossilised ammonite shells can be found all around the world, including on parts of Britain's coastline. But if you can't get to a beach to find some, why not start your own collection from home?

Fossils found in the northern part of Hokkaido are a new type of ammonite, the once-ubiquitous spiral-shelled creatures that went extinct with the dinosaurs 65 million years ago, researchers said.

Ammonite fossils, an example is shown here, are sea creatures that became extinct about 65 million years ago. Fossil remains have been found in rocks of all ages. Fossils of the simplest organisms ...

William Whiskerson: An ammonite? Kadisha: Yes. William Whiskerson: What's an ammonite? Cameron: A type of fossil. William Whiskerson: Oh, a fossil. Narrator: A fossil is a special rock that holds ...