
Petrifaction is the result of a tree or tree-like plants having been replaced by stone via a mineralization process.The organic materials making up cell walls have been replicated with minerals (mostly a silicate, such as opal, chalcedony, or quartz).Unlike other plant fossils, which are typically impressions or compressions, petrified wood is a three-dimensional representation of the original organic material.
This wood is from Washington State.