Old-age features such as floodplains and meanders gradually work their way down from the source to the mouth as a stream lowers the land.

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Old-age features such as floodplains and meanders are not features that "work their way down" from the source to the mouth; instead, they develop in the mature to old-age stages of a river's development, primarily in the lower courses of the river where the gradient is gentler and the river has more energy for lateral erosion and sediment deposition.

Old-Age Features Such as Floodplains and Meanders Gradually Work Their