Petrified wood is common on the Colorado Plateau. I know of many locations where I can stop along side the road and find pieces of petrified wood in few minutes of searching. I have had large logs around my house and yard all my life. These beautiful rocks come about as a result of minerals replacing the structure of wood over geologic time frames. The most beautiful specimens contain quartz minerals such as jasper. Large areas of the Colorado Plateau are now protected in National Monuments and Parks, where it is against the law to remove any kind of rocks or minerals.