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Subject
- Deserts[remove]24
- Petrified Forest National Park (Ariz.)[remove]24
- Petrified forests[remove]24
- National parks & reserves23
- Hills15
- Rock formations15
- Blue Mesa (Ariz.)12
- Mesas12
- Erosion11
- Rocks9
- Grasses8
- Valleys8
- Cliffs7
- Jasper Forest (Ariz.)4
- Painted Desert (Ariz.)4
- Logs3
- Quartz3
- Rivers2
- Shrubs2
- Boulders1