Avenc de l'ú

Small pit 6 metres deep in the Serra l'Obac (Mura), discovered on 15-01-2000 and explored on 13-03-2004.

Mura • Bages 9m 6m

EspeleoWorld

Avenc de l'ú

Small pit 6 metres deep in the Serra l'Obac (Mura), discovered on 15-01-2000 and explored on 13-03-2004.

Mura · Bages

Length: 9 m · Depth: 6 m

Updated record

https://espeleoworld.com/en/c/avenc-de-l-u

Information can change. Always verify coordinates, access, weather, and cave conditions before setting out.

Topographic map of the main entrance — Main entrance · ICGC topographic map

Small pit 6 metres deep in the Serra l'Obac (Mura), discovered on 15-01-2000 and explored on 13-03-2004.

Characteristics

Type: Pothole
Municipality: Mura
Region: Bages
Unit: Obac, Serra de l'
Length: 9 meters
Depth: 6 meters
Major Unit: Serralada Prelitoral
Lithology: Conglomerate
Updated on EspeleoÍndex: May 31, 2017

Location

Starting from the coll del Boix in the direction of the turó del Mal Pas de Puigdoure, we will leave the turnoff to the Hospital de Sang on our left. Further on we will also leave the spur that leads to the agulles de Matarrodona and the cova Bonica de l'Illa. We will take the next spur (spur 800, on the CET map, coincides with the figure 800 of the elevation mark) heading out on our left and following the line of the ridge. We will reach a cliff from where, directly below, we will see the Agulla Petita de Matarrodona. We will descend on our right, finding a worn gully in the forest. On the left hydrographic side of this gully, divided into two parts by a small promontory, is the avenc de l'Ú, at approximately the 767 metres elevation mark. We will find the entrance at the first division as we come, just after descending a few metres and sheltered in a block of conglomerate. Approximate coordinates.

Entrances

Always verify coordinates and access conditions before setting out.

Avenc de l' Ú
Elevation: 772 m
41.664233, 1.966550
UTM 31T (ETRS89) 413962 4613013
Open in map Open in Google Maps

Download all entrances as GPX

Topographic

View image

Click to enlarge

Espeleoindex · CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/ · Image © its author.

Image 1 of 1

Description

Morphology

The small earthy entrance of 0.60X0.25 metres had to be widened until it allowed the tight passage of a person. Footing is at -3 metres, the point where the joint, besides widening, changes direction, from the N85 of the first pit, it passes to another of N28. This new pit of -3 metres, wide and generous, allows the descent to the bottom located at -6 metres. The floor is full of sediments, we also find a collapsed slab of wall.

Speleothems

The pit of -3 metres is well adorned with concretions.

Progression

Other details

The pit of -3 metres is well adorned with roots and spiders.

History

It was discovered on 15-01-2000 by Jordi Guillemot and Clara Formosa of the Centre Excursionista de Terrassa. Due to its narrowness, they did not manage to explore it until 13-03-2004, when several members of a small group called Espeleopringuer managed to introduce an individual inside; the hard work was in getting him back out. The name was given to it by a rocky needle separated from the crag that dominates a high spot located right in the middle between the avenc de l'Ú and the cova de l'Ú; this promontory is known as the Fortalesa de l'Ú.

User Comments (0)

No comments yet.

Be the first to share your experience!

Registered Explorations (0)

No explorations registered yet.

Bibliography

Guillemot i Marcet, Jordi; Anglés i Vila, Marc (2008).-”La cova i l'avenc de l'U”. Arxiu Centre Excursionista de Terrassa (114):263-266. CE Terrassa.
Valles Tena, Jordi de (2016).-”Bages, Barcelonès, Maresme, Vallès Occidental, Vallès Oriental” Catàleg Espeleològic de Catalunya (vol.5):196-197. ECG/FCE