Fossil Friday: Ammonitic Chaos!

What is going on in this picture? Here, we see a lot of Promicroceras, early Jurassic ammonites. Ammonites are an extinct group of marine invertebrate animals which lived from the Devonian until the Cretaceous. There’s lots of fossils of them throughout the world, mostly in Jurassic limestones – but few places can rival the awesomess of this pic.