A Thrust Fault Increases the Thickness of the Crust as It

Multiple Choice

A thrust fault increases the thickness of the crust as it moves toward a continental interior in a mountain belt; yet the crust beyond the mountain front stays the same thickness. Isostasy would suggest that the area at the mountain front, where the thrust emerges, should _______over time.

A) near sea level
B) uplift
C) stay the same
D) subside