The Formation of Ox Bow
In the lower course the meanders become even larger.
Erosion on the outside of bends and deposition on the slip off slopes
continue to take place.
The erosion causes the meander
neck to narrow until eventually it breaks through. This often takes
place when the river has more energy as in times of flood.
The river now follows a straight path. After the meander has been cut
through the river seals off the bend by deposition and an ox-bow lake
is formed. In time, especially in dry areas the ox-bow lake may dry up
to form a meander scar.