•They are holes or depressions in the river bed. •They vary in size from a few centimetres to several metres in diameter.
are formed by corrosion
in rivers where the fast-flowing
water swirls, especially if the river
bed is uneven.
of stones and pebbles carried by the river whirl
around, drilling circular
depressions into the river bed.
Formation of a pothole.
Examples of Potholes in the World