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While researching a topic, a student has taken the following notes:
- The Archipelago-Madrean Mountains are located in northwestern Mexico.
- They cover an area of 1,038 square miles (mi²)
- The Big Hatchet Mountains are located in the southwestern United States.
- They cover an area of 65 mi².
- These mountain ranges are two of the dozens of "sky inlands" in the southwestern US and northwestern Mexico.
- A sky inland is an isolated mountain range whose environment differs dramatically from that of the surrounding lowlands.