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Subject
- Fossils[remove]18
- National parks & reserves18
- Petrified Forest National Park (Ariz.)18
- Petrified forests[remove]18
- Petrified wood18
- Rocks17
- Logs11
- Shrubs7
- Hills5
- Agate House (Ariz.)3
- Agates3
- Houses3
- Stonework3
- Trees3
- Walls3
- Buttes2
- Cliffs2
- Deserts2
- People2
- Rock formations2