Tectonic extension and uplift has created the mountain and valley landscape of the Great Basin. The downdropped valleys are called ____.
A) horsts
B) bajadas
C) blowouts
D) grabens

Question

Quizplus · Accepted Answer

The term "downdropped valleys" suggests a type of fault structure called a graben, which forms through extensional forces. Horsts are the uplifted blocks between grabens, while bajadas are gradual alluvial slopes at the base of mountains. Blowouts are depressions on sand dunes caused by wind erosion.

Tectonic Extension and Uplift Has Created the Mountain and Valley