How did lava flows help from the Columbia platfau

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asked Oct 24, 2020 105k views

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RRUZ · Answer 1 · 2020-10-29T17:26:01+0000

When pressure on the mantle is released as it is forced up through the crust due to subduction, it becomes basaltic magma. The Columbia River has eroded deep into the lava flows of the Columbia Plateau, revealing layers of columnar jointed basalt

How did lava flows help from the Columbia platfau

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