During the______ era, the westward- moving North American plate began to override the Pacific plate, eventually causing the tectonic activity that ultimately formed the mountains of western North America.

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The Answer of During the______ era, the westward- moving North American plate began to override the Pacific plate, eventually causing the tectonic activity that ultimately formed the mountains of western North America.

During The______ Era, the Westward- Moving North American Plate Began