In earth science, a pothole is a smooth, bowl shaped or cylindrical hollow, generally deeper than it is wide, carved into the rocky bed of a watercourse. Other names for a riverine pothole include pot, stream kettle, giant's kettle, evorsion, rock mill, churn hole, eddy mill and kolk; a related but distinct feature, the plunge pool, is the deep depression at the base of a waterfall created by the erosional turbulence of falling water.
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