Lateral Erosion – Sideways erosion by a river on the outside of a meander channel
It eventually leads to the widening of the valley and contributes to the formation of the floodplain
"Lat is fat" will remind you that lateral is the movement sideways, not down.
"Lat is fat" – he keeps growing sideways.
Remember, if you are a bodybuilder your lats come out sideways on your back. This helps remind you that lateral is the sideways movement.
These three images show how a flood plane widens in stages as a river meanders, altering course over time.
This cross section view shows some of the key features of a meander in a river. Erosion occurs where the current is fastest.