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Which of the following statements is/are correct regarding Exfoliation?
1. It is a chemical weathering of rocks in which pressure in a rock is released along parallel alignments near the surface of the bedrock.
2. It primarily occurs on intrusive igneous or metamorphosed rocks that are exposed at the Earth’s surface.
Select the correct answer using the codes given below:
1 only
2 only
Both 1 and 2
Neither 1 nor 2
Explanation: Statement 1 is incorrect: It is a mechanical weathering of rocks in which pressure in a rock is released along parallel alignments near the surface of the bedrock. Supplementary notes: Exfoliation Exfoliation is a mechanical weathering process in which pressure in a rock is released (unloading) along parallel alignments (sheet joints) near the surface of the bedrock and layers or slabs of the rock along these alignments break off from the bedrock and move downhill by gravity. Exfoliation primarily occurs on intrusive igneous or metamorphosed rocks that are exposed at the Earth’s surface. Exfoliation can occur both very slowly or very rapidly as a form of mass wasting. Large rocks characterized by exfoliation are commonly referred to as exfoliation domes. Table Rock Mountain in South Carolina and Enchanted Rock in Texas are both examples of exfoliation domes with large slabs of rock exfoliating from the bedrock.
By: Parvesh Mehta ProfileResourcesReport error
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