Opalized ammonite fossils are some of the most unique and spectacular paleontological specimens. They were formed through a geological process known as opalization, wherein organic material from ...

Fossils of them are found all around the world ... with larger sizes more common from the Late Jurassic onwards. The largest known species of ammonite is Parapuzosia seppenradensis from the Late ...

Typically spherical, they contain black-coloured ammonite fossils from the Jurassic and Cretaceous periods. In Chinese folklore, ammonites were called Jiaoshih or horn stones, as they resemble coiled ...

The discovery of a well-preserved fossil is helping researchers learn more about an iconic Jurassic-period species. The plesiosaur, considered a successful marine predatory ancient species ...

The site is quite remarkable, with numerous beautifully preserved fossils of ancient animals that once lived in a Jurassic sea that covered this part of the UK during the Jurassic. Inland locations ...