An unconformity is a contact between two rock units in which the upper unit is usually much younger than the lower unit. ... A nonconformity exists between sedimentary rocks and metamorphic or igneous rocks when the sedimentary rock lies above and was deposited on the pre-existing and eroded metamorphic or igneous rock.
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Answer:Ummm so here’s my answer – –;
An unconformity is a contact between two rock units in which the upper unit is usually much younger than the lower unit. ... A nonconformity exists between sedimentary rocks and metamorphic or igneous rocks when the sedimentary rock lies above and was deposited on the pre-existing and eroded metamorphic or igneous rock.
Explanation:Hope my answer helps u