________ is the process by which thickened crust adjusts over time to a "normal" thickness.
A)Subduction
B)Convection
C)Accretion
D)Isostacy

Question

Quizplus · Accepted Answer

Isostacy is the process by which the thickened crust adjusts over time to a "normal" thickness. Isostasy is the state of gravitational equilibrium between Earth's lithosphere and asthenosphere. It is basically a balance between the forces pushing up on the crust and the forces pushing down on the crust. When crustal material is added, like during mountain building, the crust thickens and it becomes denser, which makes it sink farther into the mantle. The sinking crust displaces the underlying mantle, which flows upward and supports the crust. Over time, the crust slowly readjusts and reaches a new state of equilibrium, which results in a "normal" crustal thickness.

________ Is the Process by Which Thickened Crust Adjusts Over