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What is the nearest plate boundary to Washington State? What type of boundary is this?

User Ofer Segev
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Answer:

For about 200 million years the Pacific Northwest region has been at an active plate boundary, specifically an ocean-continent convergent plate boundary with a subduction zone. Subduction has created most of the volcanoes and mountain ranges of the Northwest.Jul 16, 2013

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User Chamath Jeevan
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