Editing Erosion (section)

===Floods===
[[File:Seaton Beach after heavy rainfall.jpg|alt=The mouth of the River Seaton in Cornwall after heavy rainfall caused flooding in the area and cause a significant amount of the beach to erode|thumb|The mouth of the [[River Seaton]] in [[Cornwall]] after heavy rainfall caused flooding in the area and cause a significant amount of the beach to erode; leaving behind a tall sand bank in its place]]
At extremely high flows, [[Kolk (vortex)|kolks]], or [[vortex|vortices]] are formed by large volumes of rapidly rushing water. Kolks cause extreme local erosion, plucking bedrock and creating pothole-type geographical features called [[rock-cut basin]]s. Examples can be seen in the flood regions result from glacial [[Lake Missoula]], which created the [[channeled scablands]] in the [[Columbia River Drainage Basin|Columbia Basin]] region of eastern [[Washington (state)|Washington]].<ref>See, for example: {{cite book|author=Alt, David|title=Glacial Lake Missoula & its Humongous Floods
|publisher=Mountain Press|year=2001|isbn=978-0-87842-415-3|url=https://books.google.com/books?id=s4y3c8fxeEwC}}</ref>