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tranthuongbn



Posts : 316
Join date : 2011-03-04

PostSubject: PeneplainPeneplain   Thu Dec 01, 2011 3:57 am

A peneplain is a low-relief plain representing the final stage of fluvial erosion during times of extended tectonic stability. The existence of peneplains, and peneplanation as a geomorphological process, is not without controversy, due to a lack of contemporary examples and uncertainty in identifying relic examples.[1]
After the streams in an area have reached "base level", lateral erosion is dominant as the higher areas between the streams are eroded. Finally, the upland is almost gone: the stream floodplains merge in an area of very low to no topographic relief. The resulting flat plain is the ultimate stage in the cycle of erosion or geographical cy

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