fossilization

noun
1
the process of becoming a fossil or of making something into a fossil
سنگواره شدن, فسیل شدن, سنگوارگی
2
the process of becoming, or of making somebody/something become, fixed and unable to change or develop
سنگواره‌شدگی, فسیلی‌شدگی, سنگواره شدن
the fossilization of the monarchy