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Subject
- National parks & reserves[remove]27
- Petrified Forest National Park (Ariz.)27
- Petrified forests21
- Rocks20
- Fossils15
- Petrified wood15
- Shrubs14
- Hills13
- Logs11
- Rock formations10
- Deserts8
- Boulders7
- Cliffs7
- Trees5
- Mesas3
- People3
- Rock art3
- Agate Bridge (Ariz.)2
- Blue Mesa (Ariz.)2
- Buttes2