Fossilization

[ˌfɒsəlaɪ'zeɪʃn]

(noun.) becoming inflexible or out of date.

(noun.) the process of fossilizing a plant or animal that existed in some earlier age; the process of being turned to stone.

Typist: Sean--From WordNet

(n.) The process of converting, or of being converted, into a fossil.

Editor: Seth