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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Saurabh 1
These seems to be an incomplete question. As you can't really say which type of unconformity it is talking about if it has given only younger and older formation remain. So i think this one has no correct answer.... As in case of non conformity older igneous (or metamorphic sometimes) layers are overlain by sedimentary layers(in short you can say that there is a contact effect due to differing lithology or rock type) , while in case of Disconformity it is actually on a tougher side when it comes to identification in the field, as the older and younger layers are essentially parallel. Angular Unconformity as name suggest angular relationship between older and younger layers(horizontal younger layer on the tilted older ones). Local unconformity is somewhat similar to Disconformity but involve very short duration of time and is geographically limited.
Here in place of 'these ' it will be 'this'..