Which of these geologic provinces in Oregon is characterized by subduction zone volcanism?

Which of these geologic provinces in Oregon is characterized by subduction zone volcanism?

Which of these geologic provinces in Oregon is characterized by subduction zone volcanism?
the Cascade Mountains
the Columbia River Plateau          
the High Lava Plains
the Owyhee Upland Plateau
the Olympic Mountains        The post Which of these geologic provinces in Oregon is characterized by subduction zone volcanism? first appeared on Nursing School Essays.