This is a look at one of our favourite ammonites, prior to the outer matrix being polished. These ‘Cannon ball’ nodules (rocks) are thought to be exclusive to the Yorkshire Coast, found nowhere else in the world. They rarely contain fossils, but when they do, they typically contain an Eleganticeras sp. ammonite. This fossil here is featured as found. Some of the outer chambers were broken open when we cracked open this rock, which allowed a rich smell of bituminous oil to be released.