An Image/Link below is provided (as is) to download presentation
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Western Washington has many earthquakes and volcanoes because we are close to a plate boundary. A small oceanic plate (Juan de Fuca) is sinking under the North American plate. This creates a trench and a Subduction Zone. As the Juan de Fuca plate slides under the North American plate it sometimes catches and great pressure builds up. When the plates snap the pressure is released in the form of an earthquake. The leading edge of the Juan de Fuca plate melts and magma pushes its way to the surface creating volcanoes like Mount Rainier and Mt. St. Helens.