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The Columbia River Basalt Group is a large igneous province that lies across parts of the Western United States. The Basalt group includes the Steen and Picture Gorge basalt formations. states of Washington, Oregon, Idaho, Nevada, and California.RSVP for updates about Sci-Fi Speed Dating at Salt Lake Comic Con 2017!WHERE: Room # TBA at the Salt Palace COST: $ TBA SCHEDULE: Coming Soon! ABOUT / Meet an entire room full of fellow Geeks in a safe, no-pressure, and fun environment. This subsidence of the crust produced a large, slightly depressed lava plain now known as the Columbia Basin or Columbia River Plateau.The northwesterly advancing lava forced the ancient Columbia River into its present course.The ultimate cause of the volcanism is still up for debate, but the most widely accepted idea is that the mantle plume or upwelling (similar to that associated with present-day Hawaii) initiated the widespread and voluminous basaltic volcanism about 17 million years ago.As hot mantle plume materials rise and reach lower pressures, the hot materials melt and interact with the materials in the upper mantle, creating magma.
The flows can be divided into four major categories: The Steens Basalt, Grande Ronde Basalt, the Wanapum Basalt, and the Saddle Mountains Basalt.Using tomographic images based on seismic waves, relatively narrow, deeply seated, active convective plumes have been detected under Yellowstone and several other hot spots.These plumes are much more focused than the upwelling observed with large-scale plate-tectonics circulation.We provide the ice-breakers for you and turn it into a game! All your information is kept private unless there’s a match.