Here's why:

* Normal Faults: These faults occur when the hanging wall (the rock block above the fault) moves down relative to the footwall (the rock block below the fault). This downward movement stretches the crust and creates valleys.

* Horsts: These are uplifted blocks of land that are bounded by normal faults on both sides. They form the mountain ranges in the Basin and Range Province.

* Grabens: These are valleys that are bounded by normal faults on both sides. They are formed by the downward movement of the block between the faults.

So, to answer your question directly, the Basin and Range Province is not characterized by a specific *type* of mountain, but rather by a specific type of geological structure - horsts and grabens created by normal faulting.