4) turbulence increases in and around the pools(deep water) as the water speeds up, so the flow of water begins to twist and coil.
5) this causes corkscrew-like currents in the river called helicoidal flow,which spiral from bank to bank between pools.
6) the helicoidal flow causes more erosion and deepening of the pools. it also causes eroded material to be deposited on the inside of the bend, where the river looses energy.
7) the combination of erosion and deposition exaggerates the bends until large meanders are formed. the combined process also creates the meanders distinctive asymmetric cross section.
8)oxbow lakes are formed when the neck of the loop of a meander is broken through, often during flooding. Deposition dams off the loop, leaving an oxbow lake.
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