Stone from wood. This is a petrified tree trunk. Arizona, USA. When a tree dies the wood usually rots, but under certain conditions the plant issue may be replaced by minerals and it turns to stone. Editorial Stock Photo - Afloimages
Stone from wood. This is a petrified tree trunk. (Arizona, USA). When a tree dies the wood usually rots, but under certain conditions the plant issue may be replaced by minerals and it turns to stone.