
Avenc del Sot del Muronell
A 22 m deep pit in Castellar del Vallès, on the right-hand slope of the Sot del Muronell, with a single inclined shaft and galleries and chimneys at its base.
EspeleoWorld
Avenc del Sot del Muronell
A 22 m deep pit in Castellar del Vallès, on the right-hand slope of the Sot del Muronell, with a single inclined shaft and galleries and chimneys at its base.
Castellar del Vallès · Vallès Occidental
Sviluppo: 35 m · Profondità: 22 m
Scheda aggiornata
https://espeleoworld.com/it/c/avenc-del-sot-del-muronell
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A 22 m deep pit in Castellar del Vallès, on the right-hand slope of the Sot del Muronell, with a single inclined shaft and galleries and chimneys at its base.
Topografia
Espeleoindex · CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/ · Immagine © del suo autore.
Foto
Espeleoindex · CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/ · Immagine © del suo autore.
Descrizione
Morfologia
The pit consists of a single shaft, slightly inclined for the first 15 metres until it becomes vertical in the last 5 metres. The 2.3 x 1.8 metre entrance is very earthy (which guarantees a rain of sand and stones for the visitor), and the first section of the shaft narrows, taking the form of a fissure 2 x 0.7 metres wide at its middle part. At – 10 we find a gallery running S30W that becomes impassable after 3 metres. We continue descending and at – 15 a large half-detached slab narrows the shaft, with a couple of blocks wedged in it. Past the slab the shaft becomes more vertical and wider until reaching its base.
The floor of the shaft is formed by a gallery 12 metres long with a strong slope towards the S, where we reach the maximum depth of the pit. To the N of this gallery, climbing the ramp that narrows to 0.4 metres, we find a chimney 4 metres high. Towards the S the gallery is wider, almost 2 metres, and also has a chimney that climbs 9 metres and is quite heavily concreted.
The cavity is structured along a N10E joint and another in a N30E direction, that is, within the main fracturing system of the massif.
Between the levels – 12 and – 15 there are a series of sandstone strata which, affected by the two joints, have caused the detachment of the slab in mid-shaft.
Concrezioni
At present infiltration occurs at two points; one in the 9 metre chimney, and the other in the shaft at the level of the slab; in both cases some concretions have formed, quite white at the start but already more earthy at the level of the floor.
Idrologia
Only in times of heavy rain does half a metre of the bottom of the pit become flooded.
Storia
We do not know when the cavity was first explored. It does not appear in the catalogue of Sant Llorenç – Obac by F. Termes (1951). We have evidence of an exploration in April 1958 by members of the GES-CMB, which very possibly was the first. Years later it already appeared located on the maps of Editorial Alpina. A little-visited cavity due to its difficult location.
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Bibliografia
- GES-CMB (1974).- Catálogo espeleológico de la provincia de Barcelona. 198 pp. Club Montañés Barcelonés /Diputación Provincial de Barcelona.
- Puig,M; Badiella,E. (1989).- “L'avenc del Sot del Muronell” Arxiu del Centre Excursionista de Terrassa (59-62): 441-443. CE Terrassa.
- fotos 'JNC' facilitades per Jordi Navarro, (Centre Excursionista de Castellar del Vallès).
Grotte vicine

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Fonte: Espeleoindex (espeleoindex.com), modificato. CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/
