Fossilized Wood (Petrified Wood)
Petrified Wood is a fossil in which the organic remains have been replaced by minerals in the slow process of being replaced with stone. The petrifaction process generally results in a quartz chalcedony mineralization. Special rare conditions must be met in order for the fallen stem to be transformed into fossil wood or petrified wood. In general, the fallen plants get buried in an environment free of oxygen (anaerobic environment), which preserves the original plant structure and general appearance. This particular example measures 2.5 inches wide by 1.75 inches thick by 2.875 inches tall. The species is red oak (Quercus rubra). Age: 11 thousand to 1.8 million years old. Location: Alexandria (construction site), Virginia. Top surface is polished, sides left natural.