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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
December 29, 2020 • 23:23 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
. nonconformity can be recognized by occur rence of: a. contact effect below and above the plane of unconformity b. pebbles of non-sedimentary rock over the pla
. Nonconformity can be recognized by occur rence of: A. Contact effect below and above the plane of unconformity B. Pebbles of non-sedimentary rock over the plane of unconformity
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Rahul kumar
Nonconformity can be identified by looking at beds below and above the unconformity plane. Nonconformity is the unconformity plane in which igneous rocks are overlain by sedimentary succession. So, by looking at the above and below the unconformity plane the nonconformity can be identified easily. Erosion of igneous rocks will lead to the formation of non-sedimentary pebbles overlain by normal Sedimentary rocks.
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B is the given Ans
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& contact effect means igneous intrusion...so below and above wil notl be considered as uncomformity
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I haven't mentioned about the contact effect in my answer. I have just mentioned about the characteristics of rocks above and below the unconformity plane. Please read my comment carefully.
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Rahul kumar Best Answer
Yes, B can be answer. Emplacement of igneous rocks and long exposure (unconformity) will lead to erosion and formation of pebbles of non-sedimenraty rocks. So, non-confirmity can be marked by zone containing pebbles of non-sedimenraty rocks.