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Grallera d'Alsamora

Grallera d'Alsamora

A cavity with a 98-metre vertical drop in Sant Esteve de la Sarga, with an entrance of 30 X 5 metres and a shaft 69 metres deep.

Sant Esteve de la Sarga • Pallars Jussà 165m 98m

EspeleoWorld

Grallera d'Alsamora

A cavity with a 98-metre vertical drop in Sant Esteve de la Sarga, with an entrance of 30 X 5 metres and a shaft 69 metres deep.

Sant Esteve de la Sarga · Pallars Jussà

Length: 165 m · Depth: 98 m

Updated record

https://espeleoworld.com/en/c/grallera-d-alsamora

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

Main entrance reference 42.055100, 0.718250 UTM 31 · 311283 4658617
Topographic map of the main entrance
Main entrance · ICGC topographic map

A cavity with a 98-metre vertical drop in Sant Esteve de la Sarga, with an entrance of 30 X 5 metres and a shaft 69 metres deep.

Characteristics

Location

The cavity is located in the municipality of Sant Esteve de la Sarga. From the coll d'Ares we will head along the paved track to the astronomical observatory, we will continue along the track that passes right by the pic de Corona, where we find a large cairn beside the track; from here we will descend through the syncline in a northerly direction and in about 120 metres we will find the cavity, quite concealed by the vegetation despite its dimensions.

Map

Entrances

Always verify coordinates and access conditions before setting out.

  1. Alsamora, Grallera d'

    Elevation: 1502 m

    42.055100, 0.718250
    UTM 31T (ED 50) 311283 4658617
    Open in map Open in Google Maps
Download all entrances as GPX

Photos

Grallera d'Alsamora - Photo, Sant Esteve de la Sarga, Pallars JussàView 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 cavity has an entrance of 30 X 5 metres, with a N-S orientation, the south side being 10 metres higher than the north side. The shaft, 69 metres deep, narrows from -40 metres onwards, then immediately widens again to more than the upper part. The plan has a length of 80 metres and develops along the fracture, the floor being occupied by blocks and debris forming a ramp in a southerly direction, at the end of which we find the point of maximum depth.

History

Explored by the GES del CMB in 1963. The various surveys that are known give it different depths: SAS-CGB (-111); SIS-CET (-110); depending on the point of the entrance from which the measurement was taken. In the case of the ECG survey the measurement is taken from the lower lip of the entrance mouth, as established by speleological canons.

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Bibliography

  1. Cardona, F. (1989).- Grans cavitats de Catalunya, vol 1. 198 pp. EC Gràcia, Barcelona.
  2. Escolà i Boada, Oleguer. (1970).- “Catálogo Espeleológico del Montsec”.  Espeleòleg (11/12):453-541. ERE-CE Catalunya. Barcelona

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