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| Description: Shaping Stream Valleys Base level Lowest point a stream can erode to Two general types Ultimate – sea level Temporary or local Changing causes readjustment of the stream – deposition or erosion Valley sides are shaped by Weathering Overland flow Mass wasting Characteristics of narrow valleys V-shaped Downcutting toward base level Incised meanders Characteristics of narrow valleys Features often include Rapids Waterfalls Characteristics of wide valleys Stream is near base level Downward erosion is less dominant Stream energy is directed from side to side Characteristics of wide valleys Floodplain Features often include Meanders Cutoffs Oxbow lakes Picture Stats: Views: 295 Filesize: 168.22kB Height: 921 Width: 955 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39473 |