Avenc d'en Pere
A 93 m deep pit in the Garraf massif (Begues), discovered in 1967 and explored and surveyed in March of the same year.
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Avenc d'en Pere
A 93 m deep pit in the Garraf massif (Begues), discovered in 1967 and explored and surveyed in March of the same year.
Begues · Baix Llobregat
Length: 130 m · Depth: 93 m
Updated record
https://espeleoworld.com/en/c/avenc-d-en-pere
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A 93 m deep pit in the Garraf massif (Begues), discovered in 1967 and explored and surveyed in March of the same year.
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 small entrance of the pit, the result of a dig, connects with a small shaft of 8 metres with a ledge 3 metres from its start. At its base it communicates with a new shaft, with a blind roof, and 10 metres of drop, immediately followed by one of 13 metres. At the base of this begins another of about 25 metres of depth which connects laterally with two concavities, also with a blind roof and joined by coalescence, which give rise to the largest chamber of the cavity. At its lowest point a new shaft begins, cylindrical and with 26 metres of drop. 3 metres above its base there is a window that allows entry into a jointed concavity with an inclined section that descends about 12 metres more, its bottom constituting the point of maximum penetration of the pit at elevation – 93.
Other details
It should be borne in mind that at some point hypoxia has been detected, it being one of the cavities of the Garraf in which the oxygen percentage was lowest.
History
Discovered at the beginning of 1967 by a group of members of the GES – CMB led by Xavier Coromina. The entrance was opened by digging and, due to its narrowness, the first to pass through was the smallest boy, named Pere.
It was fully explored and surveyed in the month of March 1967.
Bio
Troglocharinus ferreri reitt.
Collected by Oleguer Escolà, close to a hundred live specimens, on 7 November 1975.
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Bibliography
- Borràs Xavier, Joan. (1973). Catálogo Espeleológico del macizo de Garraf (1-155)
- Ferrer Rico, Victor. (2006).-”Fitxes i topografies” Avencs de Garraf i d'Ordal (monogràfic).
- Ullastre, Joan (1967).- “Morfogénesis de una nueva sima: l'Avenc d'en Pere” Geo y Bio Karst (12): 20-22. Ed. J.Mª Armengou. Barcelona.
- Fotos d'en Josep Pastor i fotos sense rètols, extretes del blog www.espeleobloc.com.es, post del dia 17 de desembre de 2012.
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Source: Espeleoindex (espeleoindex.com), modified. CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/