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Subject
- Canyons[remove]3
- Cliffs[remove]3
- Erosion3
- Grand Canyon (Ariz.)3
- Grand Canyon National Park (Ariz.)3
- Mesas[remove]3
- National parks & reserves3
- Rock formations3
- Buttes2
- Powell Plateau (Ariz.)2
- Colorado River (Colo.-Mexico)1
- Colorado River Valley (Colo.-Mexico)1
- Granite Gorge (Ariz.)1
- Lipan Point (Ariz.)1
- Rivers1
- Trees1
- Valleys1