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Avenc de la Coma d'en Vila

Avenc de la Coma d'en Vila

An 18 m deep pit in the Serra de l'Obac, with a funnel-shaped vestibule, a 12 m vertical drop and a lower chamber with flowstone and stalactites.

Mura • Bages 40m 18m

An 18 m deep pit in the Serra de l'Obac, with a funnel-shaped vestibule, a 12 m vertical drop and a lower chamber with flowstone and stalactites.

Characteristics

Location

The most usual route starts from the house of la Mata, following the track that leads to the mas de la Coma d'en Vila, passing through the Coll de Garganta and continuing along the carena de la Castanyera. A little more than 200 metres before reaching the Coma d'en Vila, a small path leaves to our right and descends towards the torrent de la Font Freda, following a ridge fairly clear of vegetation. This ridge splits into two: one descends between the torrent de la Castanyera to the E and the torrent de la Font dels Confits to the W. The one we will follow separates to the E the said torrent de la Font dels Confits and the torrent de la Coma to the W. You must follow the ridge down until you are facing west, directly opposite the Pla de Serrallonga; we will leave the ridge line to descend straight to the bottom of the torrent. You must look for an old charcoal kiln that is a little more than 30 metres from the ridge line, and just below it, on its S side, find the mouth of the pit.

Map

Entrances

Always verify coordinates and access conditions before setting out.

  1. Avenc de la Coma d'en Vila

    Elevation: 765 m

    41.674004, 1.976953
    UTM 31T (ED 50) 414936 4614292
Download all entrances as GPX

Photos

Avenc de la Coma d'en Vila - Photo, Mura, BagesView image
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Espeleoindex · CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/ · Image © its author.

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Description

Morphology

The mouth forms a portal 2 metres wide by 1.5 metres high. From outside, we can observe a chamber about 6 metres long by 4 wide. It is funnel-shaped, but on the left side a ledge can be traversed, not without danger. On the west side of this peculiar vestibule, at the bottom of the aforementioned funnel, appears the only vertical drop in the cavity, which does not exceed 12 metres. The headwall, however, has a few drawbacks: a couple of large rocks overhang facing the bottom of the pit, one on the N lip of the shaft, where it will hinder our exploration, more on the ascent than on the descent. Another rock is suspended in balance between two walls of the vertical drop; it seems entirely secure, but it always inspires respect to have a rock of several tonnes above your head. At the base of the shaft we find a fairly spacious chamber, up to 10 metres long by 4 wide; the floor slopes slightly towards the S.

Speleothems

The sight of this area is quite spectacular, with the light entering through the mouth and the greenish colouration taken on by the walls and ceiling as well as the stalagmites found on the deeper side of this corner. We will highlight on the west wall a stalagmitic flowstone that covers the entire height of this chamber, and from the ceiling protrudes a set of stalactites worthy of admiration. We also find some flowstone on the S wall, where on its highest part it forms a kind of niche covered in concretions.

History

In the Guia monogràfica de Sant Llorenç del Munt, published in 1935 by the Centre Excursionista de Terrassa, mention is made of the Avenc de la Coma d'en Vila without any further details. Apparently, it seems they were referring to what years later we would know as Avenc del Llest, and it was then decided to rename with that name another pit that had long been known as Avenc dels Confits. Lately there are people who call it Avenc de la Coma d'Adei.

We do not know who made the first exploration or when. The oldest reference we know of a visit to the cavity is that of members of the GES – CMB in January 1954.

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Bibliography

  1. Andrés, O. (1964).- “Karstificación en conglomerados. Su estudio en el macizo de St. Llorenç del Munt-Serra de l'Obac (Barcelona)” Geo y Bio Karst (2): 9-16. Ed. J.Mª Armengou. Barcelona
  1. Badiella, X. (2007).- “L'avenc de la Coma d'en Vila” EspeleoCat (5): 38. Federació Catalana d'Espeleologia. Barcelona.

· Coordenades i fotografies “JNC” facilitades per Jordi Navarro (Centre Excursionista de Castellar del Vallès)

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