What is fossilized wood? Fossilized wood is often part of a tree trunk preserved in a fossilized form. There are 3 types of fossilized wood: petrified wood, mummified wood, and submerged forests. What is petrified wood? Petrified wood is a fossil in which the original organic materials (primarily wood and bark) have been substituted minerals in a slow process called … [Read more...] about FOSSILIZED WOOD