Stock photography, photos: Petrified Forest: Holbrook, Arizona Stock photos of Trees from the Triassic Period (200 - 250 million years ago) survive as petrified fossils in the form of ossified jasper at the Petrified Forest National Park near Holbrook, Arizona. USA Photograph: © Robert Burch Click for a larger image and more information Keywords associated with this stock photo: southwest, usa, west, western, landscape, landscapes, desert, petrified forest, national park, wood, jasper, Arizona, fossil, rock, archeology