What we’re seeing here is an ammonite fossil. Ammonites are an extinct group of marine invertebrate animals which were basically ubiquitous throughout the Mesozoic, but went extinct after it. Finding an ammonite fossil is therefore not particularly rare, and they can be found in many places of the world. What makes it special is the fact that it was pyritized. Pyritization
A newly discovered exceptionally well preserved 5 foot long Chasmosaurus Belli juvenile was discovered in an ancient riverbed in Alberta, Canada. The fossil is so well preserved that it actually left imprints of its skin on the rocks. The dinosaur was about three years old and paleontologists believe it probably drowned, and was buried and preserved by sediments. With a length of
Ok, I don’t know about you, but I simply can’t get enough of these ammonite fossils! I mean, they come in all shapes and sizes, and to make things even flashier… they even come in all colors! Opal is a hydrated amorphous form of silica, so the process of opalisation refers to something turning into an opal – like for
Archelon Ischyros on display at the Yale Peabody Museum in New Haven, Connecticut, taken in 1914. The specimen is the largest turtle ever to be known, measuring 13 feet in length (4 meters).
This giraffe-sized pterosaur was one of the largest known flying animals of all time. It had a wingspan of up to 40 feet (over 12 meters) and thrived towards the end of the Cretaceous. Quetzalcoatlus was named after a feathered lizard Aztec deity. The nature of flight in Quetzalcoatlus and other giant azhdarchids was poorly understood until serious biomechanical studies were conducted in
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.
Yes ladies and gents, we’re starting a new feature! I’m such a sucker for geology, that just one weekly feature doesn’t seem enough. I know, I know, I’ve kind of been lazy with the GeoPicture of the Week, but now, it’s settled: the GeoPicture is on Wednesday, and now we have Fossil Friday. Please, feel free to send us any fossil