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 ...

For instance, in 2022, a fossil hunter unearthed a mosasaur spine, skull, and lower jawbones near the North Sulphur River, not far from where the G. alabamaensis jaw fragments were discovered.

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 ...