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Subject
- Deserts[remove]14
- National parks & reserves14
- Petrified Forest National Park (Ariz.)[remove]14
- Petrified forests14
- Blue Mesa (Ariz.)11
- Mesas11
- Hills10
- Rock formations9
- Erosion7
- Valleys7
- Cliffs5
- Painted Desert (Ariz.)3
- Logs2
- Rivers2
- Rocks2
- Grasses1
- Shadows1