Pacific northwest tectonic setting
![Map showing tectonic plate boundaries in the Pacific northwest](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/haugerud_2004_platetecto.jpg?itok=GJZpSm-f)
Detailed Description
Subduction in Cascadia has been underway for about 35 million years. It has produced a crustal architecture known from subduction zones around the world: an accretionary prism, extending from the deformation front into the continental shelf; a fore-arc region; a volcanic arc; and a back-arc region. These features are developed within a pre-existing continental framework, are modified by motion along the continental margin, and are overprinted by other plate boundary regimes as the extent of the subduction zone changes through time.
Sources/Usage
Public Domain.