Petrified Log

Petrified log at Petrified Forest NP

Where did the petrified wood come from? Hundreds of millions of years ago, when this was a tropical landscape, lush forests covered the land. As the trees died, some floated downstream to form log jams. This explains why the petrified wood is found on its side rather than standing upright. Many of the logs are quite large, some measure more than 190 feet.

Photo by Amy Watson/Flickr