Noun fossilization has 2 senses

• fossilization(n = noun.process) fossilisation - the process of fossilizing a plant or animal that existed in some earlier age; the process of being turned to stone; Array
is a kind of action, activity, natural action, natural process
has particulars: petrifaction, petrification
Derived form verb fossilize₁

• fossilization(n = noun.act) fossilisation - becoming inflexible or out of date; Array
is a kind of passage, transition