Question

difference between block and granular disintegration .

Answer 1

this is ans of
above question

Answer 2

Block disintegration is when the rocks split along joints forming large rectangular shaped blocks. In daytime, the rocks are subjected to intense solar heat that causes the rocks to expand. At night, the temperature falls down and because of this, rocks cool and contrast. Repeated expansion and contraction causes stress along joints forming large rectangular shaped blocks.

Granular disintegration is when grains of a rock become loosened and fall out, to leave a pitted, uneven surface because of changing temperature. Rocks are made up of different types of minerals. The dark colored minerals say mica in granite, tend to absorb more heat and so are heated up faster. Light colored minerals say quartz, have the ability to reflect light  and  so are heated up slower. Repeated expansion and contraction causes loosened and fall out.