vadose shaft

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. . 2002.

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  • canyon passage —    1. A tubular passage (cave) that is formed by underground streams following gently tilted beddingplane partings or fractures and are eroding channels downward through the rock.    Their ceiling heights are greater than their widths. They are… …   Lexicon of Cave and Karst Terminology

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