Swallow-hole
See also: Swallow-hole (homonymy)
A swallow-hole (of the generally marked occitan “avenc” swallow-hole/ovén) is a Gouffre characteristic of the areas Karstique S, generally formed by the collapse of the vault of a karstic cavity (or cave) due to the dissolution of the limestones layers.
A swallow-hole is a Grotte whose access opens in the ground and who presents on whole or part of his development the form of a puit vertical or sub-vertical, which makes it difficult to reach without specific material. Dimensions of the opening on the surface of these open cavities are very variable: of a few decimetres, with one or two hectometers, in the same way the depth can be impressive.
The swallow-holes of great depth and/or having a very broad opening receive sometimes the name of Abîme or Abyme .
synomymes
- Sink-hole in Normandy and in Aveyron
- Emposieu in the Jura (with a confusion of direction with a Doline)
- Chantoir ,
- Scialet in the North of the Alps (Savoy and Isere and Drome),
- Chourun in the Dévoluy (the High Alps), (Picardy Chourun, Chourun Martin for example)
- Endousoir or endouzoère out of Champagne,
- Embut in Provence
- Barrenc in the Aude
or also:
- Cénote in Mexico in Yucatan
Some examples of swallow-holes:
- the Pit of Padirac
- swallow-holes of Orgnac-l' Swallow-hole (Ardeche)
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