A small hill of gray bentonite clay that appears to be melting into the purple bentonite of Hamilili Valley on the south end of Petrified Forest National Park, Arizona, United States of America, North America

arizona desert landscape geology rock formations red rock white rock hills mountains dry arid sky clouds blue white nature scenery outdoor travel tourism national park conservation wilderness hiking panoramic view wide shot vista erosion weathering sedimentary rock petrified wood fossilized wood earth science geological formations geological processes landforms colorful landscape natural beauty photographic composition scenic view