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Subject
- Deserts[remove]15
- Hills15
- National parks & reserves[remove]15
- Petrified Forest National Park (Ariz.)[remove]15
- Valleys[remove]15
- Mesas9
- Erosion8
- Petrified forests8
- Painted Desert (Ariz.)7
- Blue Mesa (Ariz.)6
- Rock formations4
- Rocks3
- Cliffs2
- Grasses2
- Rivers2
- Shrubs2
- Boulders1
- Jasper Forest (Ariz.)1
- Logs1
- Quartz1