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Subject
- National parks & reserves5
- Petrified Forest National Park (Ariz.)[remove]5
- Petrified forests5
- Shrubs4
- Cliffs3
- Hills3
- Rock formations3
- Rocks3
- Boulders2
- Fossils2
- Petrified wood2
- Agate Bridge (Ariz.)1
- Agates1
- Buttes1
- Deserts1
- Logs1
- Trees1
- Valleys1