Name some of depositional features formed by the rivers in the plain
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When streams flow abruptly from steeper to gentler gradients, as at the base of a mountain or ridge, its velocity is checked and the huge quantities of material carried by the river are dropped their giving rise to a broad, low cone-shaped deposit called an alluvial fan.
Thus alluvial fans form where a stream leaves a confined valley and enters a flatter region. The material constituting a fan includes coarse boulders and pebbles at its head to finer material down its slope.
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