fossilization

Such hard parts or shells were commonly favorable for fossilization.

To evoking the instincts of bygone ages, which have not been preserved by fossilization?

Till men began to wonder at the stratification of rocks, and the fossilization of shells, there was no science of Geology.

A very common kind of fossilization is the preservation of only the hard parts of organisms.

Glimpses there were of the handy, affectionate, sympathizing woman, emerging from fossilization.