Petrified Forest National Park was established in 1906 to preserve and protect the petrified woods for scientific research – see the link http://www.nps.gov/pefo/learn/nature/petrified-wood.htm for the information of how petrified woods come to being. It is not just about petrified woods but the spectacular landscape especially in the Tepees and Blue Mesa areas.
Blue Mesa
The Tepees
Stephen Hung Photography 