The type of fossil where the name literally means "turning to stone".

Petrified wood (from the Latin root petromeaning "rock" or "stone"; literally "woodturned into stone") is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization.

The 3 steps are vasoconstriction, temporary blockage of a platelet plug, formation of a fibrin clot better known as coagulation.