Columbia River Basalt Group
Continental flood basalt province in the Western United States / From Wikipedia, the free encyclopedia
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The Columbia River Basalt Group (CRBG) is the youngest, smallest and one of the best-preserved continental flood basalt provinces on Earth, covering over 210,000 km2 (81,000 sq mi) mainly eastern Oregon and Washington, western Idaho, and part of northern Nevada.[1] The basalt group includes the Steens and Picture Gorge basalt formations.