Kolk (vortex)
= Kolk (vortex)
{wiki=Kolk_(vortex)}
A "kolk" (also spelled "colk") is a geological term that refers to a specific type of whirlpool or vortex that occurs in rivers or lakes during flooding or high-flow conditions. It typically occurs when water flows around an obstruction, such as a large rock or a bend in the river, causing a circular motion in the water. This circular movement can lead to erosion as the water swirls around, pulling sediment and debris along with it.