MG 4
An enlarged manhole entrance leads to a 10 m shaft with corroded walls, whose silted-up floor reveals two fissures and a passage that soon becomes too narrow.
EspeleoWorld
MG 4
An enlarged manhole entrance leads to a 10 m shaft with corroded walls, whose silted-up floor reveals two fissures and a passage that soon becomes too narrow.
Puilaurens
Sviluppo: 15 m · Profondità: 13 m
Scheda aggiornata
https://espeleoworld.com/it/c/mg-4-puilaurens
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An enlarged manhole entrance leads to a 10 m shaft with corroded walls, whose silted-up floor reveals two fissures and a passage that soon becomes too narrow.
Descrizione
Morfologia
The entrance, which must have been enlarged, is a manhole leading to a 10 m shaft. The shaft has an elliptical cross-section and widens to 2 m x 1.5 m at the bottom. The floor is silted up with earth and blocks. Towards the SE, an impenetrable fissure leads off. On the NE side, another fissure has been enlarged; it leads to a small earthy niche with rotten walls (friable fill, mainly earth). Water has cleaned a passage towards the bottom, leading to a small step where the rock is bare; the passage splits and becomes too narrow to consider any interesting continuation.
Concrezioni
Two metres below the entrance, a ledge is covered by a stalagmitic flow. In places the walls retain the remains of old, corroded concretions, which make holds more than uncertain.
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Grotte vicine
Contiene informazioni da Grottocenter (Wikicaves), grottocenter.org, rese disponibili con la Open Database License (ODbL 1.0, https://opendatacommons.org/licenses/odbl/1-0/), modificate. · https://grottocenter.org/ui/entrances/34643 · I dati derivati sono disponibili su richiesta con licenza ODbL: [email protected] · dati aggiornati a 2026 · Fonte: Grottocenter (Association Wikicaves), worldwide collaborative cave database (grottocenter.org), modificato. CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/3.0/ Grottocenter (Wikicaves) · Testo di Cds 11 · adattato da Espeleoworld (normalizzato, tradotto); l'adattamento è rilasciato con licenza CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/3.0/ · https://grottocenter.org/ui/entrances/34643 · dati aggiornati a 2026