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Unconformity
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===Nonconformity=== [[File:Nonconformity.jpg|thumb|120px|Nonconformity]] A nonconformity exists between sedimentary rocks and [[metamorphic rocks|metamorphic]] or [[igneous rocks]] when the sedimentary rock lies above and was deposited on the pre-existing and eroded metamorphic or igneous rock. Namely, if the rock below the break is igneous or has lost its bedding due to metamorphism, then the plane of juncture is a nonconformity.<ref>{{cite book|last=Stokes|first=W. Lee|title=Essentials of Earth History 4th Edition|publisher=Prentice Hall, Inc.|year=1982|isbn=0-13-285890-8|page=[https://archive.org/details/essentialsofeart0000stok/page/65 65]|url-access=registration|url=https://archive.org/details/essentialsofeart0000stok/page/65}}</ref>
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