The following is what type of experimental design? 
Definitions:
Columnar Joints
Natural formations of vertically oriented, hexagonal columns of rock, usually found in volcanic basalt, resulting from the cooling and contraction of lava.
Shear Zone
A region of the Earth's crust where rocks have been significantly deformed due to shear stress.
Folded Metamorphic Rocks
Metamorphic rocks that have been subjected to significant pressure and heat, resulting in a folded appearance due to deformation.
Well-developed Cleavage
A property of minerals that allows them to break along flat, parallel surfaces with ease, often a result of their crystal structure.
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