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| Description: An Alluvial Fan Tributaries can deposit sediment in alluvial fans where they reach local base levels. Where the stream enters the wide valley its gradient abruptly diminishes, the discharge spreads, and its sediment (alluvium) is deposited. Picture Stats: Views: 1150 Filesize: 252.29kB Height: 960 Width: 1402 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=21118 |