Does anybody in the class know anything about the Cascade Mountains-- besides that they're mountains because they're more than that.
The burning intense beneath the Cascades is called Cascadia by geologists. The chain of mountains are not what they seem. What I mean is, that they are not just mountains-- they're also called volcanoes. The chain of Cascade volcanoes include Mt.St. Helens, Mt.Shasta, and Mt.Ranier. The Cascades begin about 200 miles north above San Francisco and end along the north coast of the Vancouver Islands. The geologic turmoil beneath the 200 mile wide silver plate is created mostly by an ocean crust known as Juan De Fuca plate. When the plates subduct, it triggers the seat of the deep seated rocks into magma that rises to the surface of a Cascade volcano. The plate can also subducts in a sudden lurch, producing a powerful earthquake. Geologists realized such an earthquake can exceed its magnitude of nine and send 40 foot high waves which are known as tsunamis crashing onto the coastline. In other words, it's like having Godzilla underneath them.
Such earthquakes occured when all are parts of the same subducting plate that get's locked against the overlaying plate, and strain builds. The sea floor plate subsides while the land on the overlaying crust below slowly submerges upward. The lock eventually breaks and subsides the floor grabs it displaying many cubic miles of ocean in a series of tsunami waves.
Until the mid 80's there was no sign that a subducting ever hit the Cascades. Some scientists figures the Juan De Fuca plate was diving beneath the continent.
That's all I have to say about the Cascades so are there any questions like something about the volcanoes that you didn't know?