Q. Which of the following statements with regard to the Cascade Range is/are correct?
1.It is a major volcanic mountain range of western North America that forms part of the Pacific Ring of Fire.
2.The active volcanism in the Cascades is driven by a subduction zone where the dense North American Plate plunges beneath the Juan de Fuca oceanic plate.
3.The range features a mix of thousands of small, short-lived vents alongside a few strikingly massive stratovolcanoes like Mount St. Helens.
Select the correct answer using the code given below:
Answer: B
Notes:
Explanation:
- Statement 1 is correct: The Cascade Range is a prominent segment of the Pacific Ring of Fire in the US Pacific Northwest and Canada, well-known for its historic volcanic eruptions.
- Statement 2 is incorrect: Subduction occurs because the dense oceanic Juan de Fuca plate plunges beneath the overriding continental North American Plate.
- Statement 3 is correct: Geomorphically, the Cascades are built from a base of thousands of small, short-lived volcanic domes and cones, punctuated by massive, prominent volcanic peaks like Mount St. Helens and Mount Rainier.
