Definition
Unconformities are defined as surface of erosion of rock separating the underlying older formation from overlying younger formation.
Formation of Unformaties
1.Deposition of older beds
2.Emergence and erosion
3.Submergence
4.Deposition of younger beds.
First older rocks are deposited in large water bodies.After sometime they are subjected to upward force due to tectonic causes(the cause occur under earth surface).This cause the distortion of older bed from its original position and emerges from water.After the emergence the rock beds are subjected to various weathering agents .These remove the top portion of the rock beds making them smooth and even.The beds then again submerge under water and new rock beds deposit on them.
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