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Subject
- Deserts[remove]16
- National parks & reserves16
- Petrified Forest National Park (Ariz.)[remove]16
- Petrified forests[remove]16
- Rock formations[remove]16
- Blue Mesa (Ariz.)10
- Erosion9
- Mesas9
- Hills8
- Cliffs7
- Rocks6
- Grasses4
- Valleys4
- Jasper Forest (Ariz.)3
- Boulders2
- Quartz2
- Shrubs2
- Canyons1
- Logs1
- Mounds (Landforms)1