Y
- Yangtze PlateThe Yangtze Plate, also called the South China Block or the South China Subplate, comprise
- Yates FormationThe Yates Formation is a geologic formation in southeast New Mexico and west Texas. It pre
- Yellowstone CalderaVolcanic caldera in the United states
- Yellowstone fires of 1988Natural event in Yellowstone National Park, United States
- Yellowstone hotspotVolcanic hotspot in the United States
- YingxiuYingxiu (Chinese: 映秀; pinyin: Yìngxiù) is a town of southern Wenchuan County, in central S
- Yornup, Western AustraliaYornup is a small town in the South West region of Western Australia, situated between Bri
- Young Earth creationismForm of creationism
- Younger DryasTime period c. 12,900–11,700 years ago
- Youngest Toba eruptionVolcanic supereruption 74,000 years ago in Indonesia
- Youth Climate MovementInternational network of youth organizations
- YungasNatural region in South America