The joints in the photograph mimic topography,indicating that they formed
A)while the granite was still molten.
B)while the rocks were still buried at great depth.
C)when the weight of overlying rocks was unloaded,allowing expansion along the joints.
D)along a subduction zone.

Question

The joints in the photograph mimic topography,indicating that they formed 
A)while the granite was still molten. 
B)while the rocks were still buried at great depth. 
C)when the weight of overlying rocks was unloaded,allowing expansion along the joints. 
D)along a subduction zone.

Quizplus · Accepted Answer

The mimicking of topography by joints suggests that they formed due to the relief of pressure when the weight of overlying rocks was removed, allowing for an expansion in the rocks along the joints. This process usually occurs after the rocks have been buried at depth and then uplifted to the surface. Therefore, option C is the best answer.

The Joints in the Photograph Mimic Topography,indicating That They Formed