Here's why:

* Uplifted and Extended Crust: The Basin and Range Province is characterized by a series of fault-block mountains (uplifted areas) separated by valleys (lower elevation areas). This is a result of the crust being stretched and thinned, causing it to break and move vertically along faults.

* Alternating High and Low Elevations: The uplift and extension create the distinctive landscape of alternating high mountain ranges and low-lying valleys.

The Basin and Range Province extends across much of the southwestern United States, including Nevada, Utah, Arizona, and parts of California, Idaho, and Oregon.