The Andes Mountains and Cascade Range are formed by convergent boundaries due to plate subduction.
Andes Mountains and Cascade Range in North and South America are mountain ranges formed due to convergent boundaries. The Andes Mountains result from continent-ocean convergence, specifically the Nazca Plate subducting under the South American Plate. The Cascade Range is the product of modern subduction of the Juan de Fuca and Gorda Plates under the North American Plate.
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