>>8043326The water slows down and drops sediment, but is very slow and has odd looking sediment due to the volcanos and glaciers melting. It builds up over time and gets in the water's way. It also freezes which slows things even further. There is this crazy thing in Russia too, the mouth of the Lena river is unbelievable. But I apologize for this not being a wallpaper worthy sized image.
