UIS Commission on Karst Hydrogeology and Speleogenesis
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Glossary

Glossary of Karst and Cave Terms

entrenchment
Erosion of an existing cave floor by a freely flowing stream to form a canyon passage that is commonly narrower than the original passage. Where the stream entrenches an originally tubular phreatic passage a characteristic keyhole shaped profile develops. Also known as vadose entrenchment or incision [9].