Insular Plate
Ancient oceanic plate / From Wikipedia, the free encyclopedia
The Insular Plate was an ancient oceanic plate that began subducting under the west-coast of North America around the early Cretaceous period. The Insular Plate had a chain of active volcanic islands that were called the Insular Islands. These volcanic islands, however, collided then fused onto the west-coast of North America when the Insular Plate jammed then shut down ending the subduction zone.[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Insular_Omineca_arcs.png/320px-Insular_Omineca_arcs.png)