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学科
- Mineral deposits[remove]7
- Minerals7
- National parks & reserves[remove]7
- Springs7
- Fences4
- Fountain paint pots (yellowstone national park)4
- Lower geyser basin (wyo.)4
- Mud4
- Trees4
- Yellowstone national park4
- Geysers2
- Valleys2
- Clouds1
- Forests1
- Hills1
- Mountains1
- Rock formations1
- Terraces1
- Waterfalls1