What is the plate tectonic environment that has caused the formation of the volcanoes of the Cascade Range in Oregon and Washington States (including Mt. Rainier, Mt. St. Helens)?

Question

Quizplus · Accepted Answer

The volcanoes of the Cascade Range in Oregon and Washington States, including Mt. Rainier, Mt. St. Helens, are formed in a subduction zone environment. This is where the Juan de Fuca plate is being subducted beneath the North American plate, causing magma to rise up and form the Cascade Volcanic Arc.

What Is the Plate Tectonic Environment That Has Caused the Formation