Trace fossil – Trace fossils are traces or marks left behind by an organism. They show an organism was there, but are not the actual organism itself (which would be a body fossil). Dinosaur footprints ...

The footprints are significant, Feibel said, because they fall into the category of "trace fossils"—which can include footprints, nests and burrows. Trace fossils are not part of an organism but ...