Shark Egg Case (Palaeoxyris prendeli) - Mazon Creek 964c4db65f9489e6f6012b3ec2a0cea1 Carcharodontosaurus (named after the shark

Carcharodontosaurus (named after the shark

Cleoniceras cleon

thus allowing for a rainbow of colors to be formed

It's not uncommon to find the fossilized skeletal remains of several cave bear families from different time periods in the same cave

Shark Egg Case (Palaeoxyris prendeli) - Mazon Creek 964c4db65f9489e6f6012b3ec2a0cea1 Carcharodontosaurus (named after the sharkPalaeoxyris sp. and other shark egg cases were discovered roughly 175 years ago and because of their association with plants material in Mazon Creek concretions they were initially classified as plants. Not all researchers agreed, and only years later was the relationship with modern forms of spiral shark egg capsules established. These long, narrow, spindle shaped fossils have surfaces marked by weak spiral lines in a helix. At least 9 species of