Crystal growth
– Occur in hot desserts where vaporation exceeds the amounts of rainfall received.
-It involves the growth of salt crystal within a rock.
-Capillary action drains the water from the rock to the surface.
-Once the water reaches the surface, it evaporates leaving a precipitate which crystallizes.
-The crystals extent pressure on the crevices and widen them.
-This leads to the rocks forming hollows and breaking them.
Exploitation
-Occurs in rocks with a uniform structure/homogenous.
-During the day the rock’s surface heat up rapidly because of high temperature.
-The rock surface expands more than the inner parts leading to cracks in the rocks.
-When tem-The alternate expansion and contraction resulting in the peling off the rock forming a round mould
of rock called exploitation dome. Block disintegration -Caused by large withdrawal of
temperatures.
-Occurs where rocks are well formed.
-During the day, the rock heats up and then expand.
-The repeated alternate expansion and contraction results in breakage of rocks along their joints
into smaller blocks.
Granular disintegration.perature fall of right the surface layer of the rock contracts and more rocks develop.
Occurs in the rocks that are made of different minerals (hetegrenonol) Different minerals have
different roles of expansion and contraction when exposed to alternate heating and cooling. This
leads to the breaking of a rock into individual smaller granulate fragments and coarse grains.
gideon1 answered the question on September 29, 2017 at 17:56
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