Petrified Forest National Park- Elizabeth Call By calleli000 1540 Prehistoric Peoples live in the park (13,500 BCE-1540 CE) 1851 Captain Lorenzo Sitgreaves first documents petrified wood in Petrified Forest National Park Dec 8, 1906 President Theodore Roosevelt creates the Petrified Forest National Monument Aug 25, 1916 President Woodrow Wilson signs the National Park Service Act Sep 23, 1932 Over 53,000 acres are added to Petrified Forest National Park Sep 9, 1962 Petrified Forest National Park is officially established and completed 2004 Paleontologists discover 50 new fossil sites and at least a dozen dinosaur skeletons Dec 3, 2004 George W. Bush signs a bill that allows Petrified Forest National Park to expand by more than 2x the size. Apr 15, 2005 Painted Desert Community Complex Historic District listed on the National Register of Historic Places. Dec 8, 2006 Petrified Forest National Park celebrates 100 years of protection