eli5 why are the cascades so far inland when the juan de fuca and north American plate meet in the ocean

Question

eli5 why are the cascades so far inland when the juan de fuca and north American plate meet in the ocean

In: 2

Answer 1

The plates meet at the surface under the ocean, but that’s not where the melting takes place. The Juan de Fuca plate is subducting under the North America plate, and as the slab sinks under the North America plate, it melts and the magma rises straight up to form the Cascade Range.