Planetary Ecologist<p>Kolk (vortex) (Oceanography 🌊)</p><p>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...</p><p><a href="https://en.wikipedia.org/wiki/Kolk_(vortex)" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Kolk_(vo</span><span class="invisible">rtex)</span></a></p><p><a href="https://mastodon.social/tags/Kolk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Kolk</span></a> <a href="https://mastodon.social/tags/Vortices" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Vortices</span></a> <a href="https://mastodon.social/tags/Oceanography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Oceanography</span></a> <a href="https://mastodon.social/tags/Geomorphology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geomorphology</span></a> <a href="https://mastodon.social/tags/Hydrodynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Hydrodynamics</span></a></p>