How are a trace fossil and a bone fossil different?

Well, fossils are the remains of any organisms that were once alive preserved in petrified form or as a mold or cast in rock form. Trace fossils are geological records of biological activity. Trace...

56

Fossilized evidence of animal behaviour, also known as ichnofossils, biogenic sedimentary structures, bioersion structures, or lebensspuren. The fossils include burrows and trails.

Trace fossils are any evidences that an organism existed, including footprints, trails, burrows, chemical marker, and fossilized dung. Index fossils are those that are only found in a specific...

if the original organism dissolves or decays, leaving a hollow in the rock, that is a mold. If the mold fills up with sediment which gradually hardens into the shape of the original organism, then...