… was first proclaimed a national monument by President Theodore Roosevelt under the Antiquities Act 107 years ago today (December 8, 1906). It became a national park in 1962.
With one of the world’s largest and most colorful concentrations of petrified wood, multi-hued badlands of the Painted Desert, historic structures, archeological sites, and displays of 225 million year old fossils, this is a surprising land of scenic wonders and fascinating science.
Petrified Forest was set aside as a national monument in 1906 to preserve and protect the petrified wood for its scientific value. It is recognized today for having so much more, including a broad representation of the Late Triassic paleo-ecosystem, significant human history, clear night skies, fragile grasslands ecosystem, and unspoiled scenic vistas.
Petrified Forest is one of the national parks that has Class I air. Class I National Park Service areas have the highest level of air quality protection under the law. These areas are defined as national parks larger than 6,000 acres or wilderness areas over 5,000 acres that were in existence when the Clean Air Act was amended in 1977.