The principal causes of mechanical fragmentation of rocks in place are ________.
A)always inscrutable because they happened at some time in the past
B)biologic activity, expansion from sheeting, frost wedging
C)erosion and transport by moving wind, water, or ice
D)the relentless actions of Sisyphus

Question

Quizplus · Accepted Answer

Mechanical fragmentation of rocks in place can occur due to biologic activity like plant roots growing in cracks or the expansion from sheeting. Frost wedging where water gets into the cracks and expands when it freezes is also a significant cause.

The Principal Causes of Mechanical Fragmentation of Rocks in Place