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Subject
- National parks & reserves[remove]59
- Petrified Forest National Park (Ariz.)[remove]59
- Petrified forests47
- Deserts36
- Hills33
- Rocks32
- Rock formations25
- Fossils18
- Mesas18
- Petrified wood18
- Shrubs17
- Valleys16
- Blue Mesa (Ariz.)14
- Erosion14
- Logs14
- Cliffs13
- Painted Desert (Ariz.)9
- Grasses8
- Boulders7
- Trees6