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Unconformities are surfaces that separate two different sequences of sedimentary rocks with different age or sedimentary rocks from igneous or metamorphic rocks and that mark a period of erosion or non-deposition. An unconformity represents a break in the sedimentary record, where there is no record of a period of geological time. In geology, the missing time interval is called a hiatus



Detrital and Authigenic Minerals
Sedimentary Structures
Sedimentary Rocks


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