how does the earth keep dinosaurs bones and such “fresh”?

Question

How does dirt and stone and such preserve bones and fossils?

In: Chemistry

Answer 1

In replacement, sediments and minerals replace bones, tissue, and shells. Often, these fossils have completely lost any original organic material they may have possessed, and are like exact copies of the original. There are other types of fossilization, but I think that’s the kind you were referring to.