Petrified Forest National Park - Arizona. 93,532.57 acres. This portion of the Chinle Formation has a great concentration of 225-million-year-old petrified wood. The surrounding region, the Painted Desert, has eroded red-hue volcanic rock called bentonite. There are also dinosaur fossils and over 350 Native American sites.

Petrified Forest National Park - Arizona. 93,532.57 acres. This portion of the Chinle Formation has a great concentration of 225-million-year-old petrified wood. The surrounding region, the Painted Desert, has eroded red-hue volcanic rock called bentonite. There are also dinosaur fossils and over 350 Native American sites.

White House Ruins, Anasazi ruins at Canyon De Chelly, Arizona | by SheldonBranford (RichGreenePhotography.com), via Flickr

White House Ruins, Anasazi ruins at Canyon De Chelly, Arizona | by SheldonBranford (RichGreenePhotography.com), via Flickr

Meteor Crater, AZ; the best-preserved impact site in the world.

Heavy Hitters: Earth's Most Amazing Meteor Craters

MLA Works Cited Sources Page for Students

MLA Works Cited Sources Page for Students

Students can my MLA Works Cited Sources page to record the sources they use, collecting the core elements in the correct order. Updated to reflect the 2016 MLA

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