In Arizona, There is a Petrified Opal Tree Trunk (About 225 Million Years Old)
What is petrified wood? It is essentially a fossil. The process by which a tree or plant with tree-like characteristics turns into stone through mineralization is called petrification. It occurs when silt or volcanic ash bury plant materials, protecting it from degradation with the help of organisms and oxygen. Then, as groundwater with high concentrations…