In the Kits: #3: Brachiopod Molds - Sometimes after an organism gets buried in rock ... we would call that a permineralized fossil of the sponge. In the Kits: #4: Dinosaur bone, # 6: Petrified wood ...

“One of the least familiar fossils in the book is an amazingly preserved dinosaur braincase that includes natural molds of ...

Most mammals during the Cretaceous period were about the size of modern mice, yet Heleocola piceanus broke this mold by reaching ... the end of the dinosaur era. The fossil find of Heleocola ...