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Rock Base of Pacific Maritime (or Western Cordillera)?

I need to know whether the rock base of this area is either: Sedimentary Igneous or Metamorphic. Thanks for your help, educated responses only please :)

Public Comments

1. ooh tough one! The western Cordillera encompasses the rocks along the subducting plate boundry in the northwestern US, canada, as well as 'batholiths' and stocks in Idaho and California. Long story short, it's Igneous.