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Exposure surfaces occur on land and under the sea, but in this chapter we are concerned only with subaerial exposure surfaces. More specifically we are concerned with the effects of subaerial exposure on carbonate sequences. Subaerial exposure surfaces are areas where upper bounding surfaces of sediment or rock show the effects of being exposed at the Earth’s surface. In order to recognize fossil subaerial exposure surfaces they need to be exposed long enough to allow subaerial diagenetic processes to modify or obliterate pre-existing fabrics. This will be recorded as a break in the sedimentary sequence. This usually means...

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