la Grallera d'odèn

A 54 m deep pit in the upper part of the Serra d'Odèn, known as la Grallera d'Odèn, with jackdaw guano and two surveys from 1963 and 1978.

Odèn • Solsonès 63m 54m

EspeleoWorld

la Grallera d'odèn

A 54 m deep pit in the upper part of the Serra d'Odèn, known as la Grallera d'Odèn, with jackdaw guano and two surveys from 1963 and 1978.

Odèn · Solsonès

Sviluppo: 63 m · Profondità: 54 m

Scheda aggiornata

https://espeleoworld.com/it/c/la-grallera-d-oden

Le informazioni possono cambiare. Verifica sempre coordinate, accesso, meteo e condizioni della cavità prima di partire.

Mappa topografica dell'ingresso principale — Ingresso principale · Mappa topografica ICGC

A 54 m deep pit in the upper part of the Serra d'Odèn, known as la Grallera d'Odèn, with jackdaw guano and two surveys from 1963 and 1978.

Caratteristiche

Tipo: Abisso
Comune: Odèn
Regione: Solsonès
Unità: Port del Comte, el
Sviluppo: 63 metri
Profondità: 54 metri
Unità principale: Prepirineu
Litologia: Calcare
Aggiornato su EspeleoÍndex: 8 ottobre 2017

Località

Located in the upper part of the Serra d'Odèn or de Campelles. It is reached via the C-463 road, from Sant Llorenç de Morunys to the Pont d'Espia; at km. 26.885, just in front of the old schools of Odèn, a track turns off to the right that within a few metres leads to the house of the Call d'Odèn. From here a track (camí de l'Estany) starts off heading NE until, after a few kilometres, it suddenly changes direction and turns west to climb up towards the Serra d'Odèn or de Campelles. It passes very close to the collada de l'Estany and changes slope. From here one must take a track that branches off to the right (in the direction of the Gespeguera) and follows the Serra de Campelles along its NW slope until reaching the height of the font del Pó, and then go to find the opposite slope (vall del riu d'Odèn) until finding a large scree slope that must be descended, keeping to the left (according to the direction of descent), and reach another scree slope, at the edge of which the cavity is found. Access must be by 4x4 vehicle.

Ingressi

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Grallera d'odèn, la
Quota: 2035 m
42.163905, 1.491448
UTM 31T (ETRS89) 375385 4669076
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Topografia

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Descrizione

Morfologia

An elongated entrance leads to a shaft of good dimensions that descends vertically a little more than 40 metres to reach a very inclined level that quickly connects with a small shaft of about 8 metres, at the bottom of which the cavity ends. The depth is 54 metres on one survey and 56 metres on the other. The two existing surveys show considerable differences, especially in the final section: one (1963) shows the ramp at the -40 level as very short and appears as a single shaft, and the other (1978) shows the ramp as much longer and claims to show two shafts.

Progressione

The descent was made with a re-rig to descend the last shaft, according to F. Fadrique, who made the descent on 23-9-2017. In 1963 Montserrat Ubach made a partial descent with the 20 metres of ladder they carried.

Altri dettagli

The walls show a strong presence of jackdaw guano and, both on the ramp and at the base, there is also a lot of guano and an accumulation of decomposing organic material. In Odèn it is known simply as la Grallera, and no other is known there; given the number of cavities named this way, it was decided to keep the name given by Salvador Codina as la Grallera d'Odèn.

Storia

Known for a long time by the shepherds of the area, it was pointed out to Montserrat Ubach who, together with her parents (C. Tarrès and J. Ubach), located it during the days 14 to 19 April 1963 and she made a partial descent with the 20 metres of ladder they carried. During those same days they also located another pit, the one that shortly afterwards would be named Avenc Montserrat Ubach. From here the Operació Solsonès began and in the first days of June of the same year a team made up of J. Subils, J. Senent, E. Sabaté and M. Ubach carried out the exploration of the cavity, naming it Avenc de les Gralles, which they published the following year in the CEC magazine: Montaña no. 90.

No further news of the pit was heard, but in 1978, Daniel Vergés (EPR) of the GES-CMB explored a grallera in the Odèn area, naming it Forat de la Grallera, and passed the references to the team compiling the Catàleg Espeleològic de Catalunya (1980), but the location data are erroneous or the editors did not know how to interpret them, since it is placed below the Puig Sobirà, on the other slope of the riu d'Odèn. The two surveys have significant differences, although the depth is almost the same.

Many years had to pass, specifically until 2007, when S. Codina of the CE del Solsonès referred to the cavity and named it Grallera d'Odèn, thinking that it was the cavity described by Vergés (Corriol no. 147), giving a fairly correct location, which is also reflected in the Catàleg Espeleològic de Catalunya (2009) by Jordi de Vallès.

Ten years later, on 23 September 2017, members of the 'Comissió per a la protecció de l'avenc Montserrat Ubach' within the Projecte Francesc Español for biospeleological research, accompanied by Pep del Call and with the directions given by Joan Sabata Irla, a former shepherd who knew the pit, managed to locate it and carry out a quick exploration (Floren Fadrique and Eduard Badiella) for biospeleological purposes.

With all these data the conclusion is reached that the Avenc de les Gralles (1963) and the Forat de la Grallera (1978) are the same cavity.

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Bibliografia

Borràs,J; Miñarro,J.M; Talavera,F.(1980).-”l'Urgell, el Solsonès, la Segarra i el Berguedà”. Catàleg Espeleològic de Catalunya (vol 5):1-233. Ed. Políglota. Barcelona.

Codina, S. (2007).- “La Grallera d'Odèn” Corriol (147): 10-11. Centre Excursionista del Solsonès. Solsona.
Subils, J.; Senent, J.; Escolà, O.(1964).-”Operació Solsonès”. Montaña (90):47-55. Centre Excursionista Catalunya.
Ubach, Montserrat; Escolà, Oleguer.(1968).-”Operació Solsonès – campanyes 1962 a 1965 (primera etapa). Espeleòleg (5):158-162. ERE-Centre Excursionista de Catalunya.
Valles, J. de (2009).- Catàleg Espeleològic de Catalunya. Vol. 2: 384 pp. Espeleo Club de Gràcia/Federació Catalana d'Espeleologia. Barcelona.

Dades de situació, coordenades i fotografies facilitades per Montserrat Ubach (Sarawak). També es pot consultar el blog: avencmontserratubach.blogspot. Apunt dins la secció: Projecte Francesc Español (28-9-2017)