- Cave passage, usually of canyon form, believed to be created by paragenesis. Passage formation by paragenesis is normally very difficult to prove, as later sediment removal leaves a passage that looks very similar to the far more common vadose canyon. It is thought that some of the larger canyons in the Flint Mammoth Cave System, USA, may have formed in this way .
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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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
Gruta de Moinhos Velhos — The Gruta de Moinhos Velhos, is one of the most important cave systems known in the Portuguese Maciço Calcário Estremenho, with about 9 km in extension. It is characterized by the existence of two fóssil paragenetic main conduits of about one… … Wikipedia