Kolk (vortex) (Oceanography 🌊)

A kolk is an underwater vortex causing hydrodynamic scour by rapidly rushing water past an underwater obstacle. High-velocity gradients produce a high-shear rotating column of water, similar to a tornado. Kolks can pluck multiple-ton blocks of rock and transport them in suspension for kilometres. Kolks leave clear evidence in the form of kolk lakes, a kind...

https://en.wikipedia.org/wiki/Kolk_(vortex)

#Kolk #Vortices #Oceanography #Geomorphology #Hydrodynamics