I want to know the answer to the following question:
The Copper Canyon is deeper than what popular American canyon?
All the background I'm provided with is that "The Sierra Madre Occidental mountain range, an extension of the Rocky Mountains, dominates the state's terrain and is home to the state's greatest attraction, Las Barrancas del Cobre, or Copper Canyon, a canyon system larger and deeper than the Grand Canyon.". Is that enough to answer the question?