- vadose shaft
- A vertical tube in the vadose zone that may be a few inches to several feet in diameter and may be a few feet deep to hundreds and over a thousand of feet deep. They commonly occur as complexes. A drain hole is usually evident at their base.See also vertical shaft.
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
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vertical shaft — These are formed by underground water dripping of flowing straight downward through the limestone along vertical cracks. Uniformly distributed dissolution of the rock results in a silo or well shaped passage so that most of them appear roughly … Lexicon of Cave and Karst Terminology
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