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The Columbia Plateau in Washington and Oregon is ________. a. a caldera filled with rhyolite lava flow.b. a thick stack of welded-tuff layers c. a flood basalt plateaud. a field…

The Columbia Plateau in Washington and Oregon is ________. a. a caldera filled with rhyolite lava flow.b. a thick stack of welded-tuff layers c. a flood basalt plateaud. a field…
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The Columbia Plateau in Washington and Oregon is ________. a. a caldera filled with rhyolite lava flow.b. a thick stack of welded-tuff layers c. a flood basalt plateaud. a field of large stratovolcanoes

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User Assylias
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Answer:

b. a thick stack of welded-tuff layers

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User Shirley
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