Insular plate

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.

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