Avenc de Sant Jaume de la Mata
A 52 m deep pit in the Serra de l'Obac, known and explored since 1922.
EspeleoWorld
Avenc de Sant Jaume de la Mata
A 52 m deep pit in the Serra de l'Obac, known and explored since 1922.
Mura · Bages
Length: 104 m · Depth: 52 m
Updated record
https://espeleoworld.com/en/c/avenc-de-sant-jaume-de-la-mata
Information can change. Always verify coordinates, access, weather, and cave conditions before setting out.
A 52 m deep pit in the Serra de l'Obac, known and explored since 1922.
Topographic
Espeleoindex · CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/ · Image © its author.
Photos
Espeleoindex · CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/ · Image © its author.
Description
Morphology
The entrance is funnel-shaped; on one side it has a ramp by which we can descend to a not very wide opening, easy to enter but very uncomfortable on the way out. From here a sloping shaft of 26 metres follows, which we will descend always brushing against the wall and where, a few metres above its bottom, we will find a ledge formed by a large wedged block; we will continue down until reaching a cone of debris; on one side we can follow a short crawl that ends in a small chamber; in the opposite direction a steep ramp continues that ends vertically and leaves us at the beginning of a descending gallery that we will follow until it opens out into a chamber about 3 metres high, 8 long and some 5 wide. From the N side of this chamber, after having carried out a clearance, one reaches a crawl and a shaft of a couple of metres that place us in a descending gallery that goes down to -52 metres. In the roof of the gallery we find an ascending duct that ends in a short gallery.
History
The first exploration of this cavity took place on 2 April 1922 by 17 members of the Centre Excursionista de Terrassa; en Rigol Fornaguera made a first survey that was published in the Arxiu del CET no. 17 of that same year 1922, together with a detailed description. The following Sunday it was explored again. On 2 April 2018 members of the Espeleo Club de Sabadell carried out a clearance at the final part of the cavity and accessed new galleries that give it greater depth. Despite not being of special interest, it is one of the best-known cavities of the massif.
Bio
Coleoptera
- Troglocharinus kiesenwetteri sanllorenci (formerly Speophilus kiesenwetteri)
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Bibliography
- Badiella, X. I Buil, A. (1982).- “L'avenc de Sant Jaume de la Mata” Arxiu del Centre Excursionista de Terrassa (27): 483-484. Terrassa.
- Lloret, J.; Rubinat, F. (1973).- “El Avenc de Sant Jaume de la Mata”. Gours (1): 21-25. GEFOMA. Barcelona.
- Vives, S. (1972).- “Topografies subterrànies al C E de Terrassa”. Com. II Simposium de Metodologia Espeleològica – Topografia. ECE – SIE del CEA. Barcelona.
- Coordenades i fotografies facilitades per Jordi Navarro (Centre Excursionista de Castellar del Vallès).
- Dades actualitzades el desembre de 2019. Topografia actualitzada realitzada per l'Espeleoclub de Sabadell el 2018. Dades facilitades per Sergi Gago (ECS).
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Source: Espeleoindex (espeleoindex.com), modified. CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/