Centuries ago quarrymen learned that when quarrying granite it was usually easiest to break the rock along a nearly horizontal surface.We now know this arises because ________.
A)uplift and exhumation of granites produces an unloading,which produces sheeting joints like the quarrymen used
B)frost wedging for hundreds of thousands to millions of years have produced cracks parallel to the ground surface
C)chemical weathering of granite makes the material expand,pulling it away from the underlying rock
D)it was a false observation; the quarrymen in those days couldn't measure resistance,and it just seemed easier to wedge blocks of this type

Question

Quizplus · Accepted Answer

Uplift and exhumation of granites produces an unloading, which causes the formation of sheeting joints. These sheeting joints are nearly horizontal fractures that make it easier to break the rock in a quarry.

Centuries Ago Quarrymen Learned That When Quarrying Granite It Was