Cascade range in washington and oregon?

Question

What type of plate boundary exists at the cascade range. What are some features or geologic events that are related to the plate boundary in the cascades. Describe the plate tectonic activity that is going on there?

Answer 1

The Juan de Fuca plate is diving under the North American plate just off the coast of WA and OR in the Cascadian subduction zone. The effect is to create volcanoes and the potential for big earthquakes.

http://en.wikipedia.org/wiki/Juan_de_Fuc...