Grallera del Coll de l'olla

A 44-metre-deep pit in La Vansa i Fórnols, known since time immemorial and explored by the GELL between 1998 and 2005.

Vansa i Fórnols, La • Alt Urgell 65m 44m

EspeleoWorld

A 44-metre-deep pit in La Vansa i Fórnols, known since time immemorial and explored by the GELL between 1998 and 2005.

Vansa i Fórnols, La · Alt Urgell

Length: 65 m · Depth: 44 m

Updated record

https://espeleoworld.com/en/c/grallera-del-coll-de-l-olla

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

A 44-metre-deep pit in La Vansa i Fórnols, known since time immemorial and explored by the GELL between 1998 and 2005.

Characteristics

Type: Pothole
Municipality: Vansa i Fórnols, La
Region: Alt Urgell
Unit: Port del Comte, el
Length: 65 meters
Depth: 44 meters
Major Unit: Prepirineu
Lithology: Limestone
Updated on EspeleoÍndex: November 26, 2015

Location

From Ossera, we will take the track that passes beside the water pool and heads towards the coll d'Ares; on reaching the Era de Polla we will take the right-hand turn-off, in the direction of the Cortal dels Plans, which we will leave on the right in order to continue onwards, going deeper into the Casal woods in the direction of the abandoned mas de Casal, which we will also leave on the right. In time, we will reach Plansarell, an esplanade that places us above the barrancs de Forn and Caferna.

Now we must leave the main path; we will deviate slightly to the right, following the red marks through the woods along the left bank of a gully in the direction of the Roca dels Morruts, until on the steep slope we locate the wide mouth of the grallera, encircled by moss.

Approximate coordinates.

Entrances

Always verify coordinates and access conditions before setting out.

Coll de L'olla, Grallera del
Elevation: 1400 m
42.225790, 1.424910
UTM 31T (ED 50) 370109 4676250
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Topographic

Grallera del Coll de l'olla - Topography, Vansa i Fórnols, La, Alt Urgell

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

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Photos

Grallera del Coll de l'olla - Photo, Vansa i Fórnols, La, Alt Urgell

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Description

Morphology

A 4 x 2 metre entrance and a 23-metre pit; the base, slightly wider, is characterised by a large accumulation of blocks. A pit with a drop of 8.3 metres follows; at the base, a comfortable chamber communicates with a lateral fissure where a 3-metre step places us in a new lateral passage with an unsettling cone of debris where a new vault similar and parallel to the previous ones has been found; clearance work is currently under way.

History

Known to the people of Ossera since time immemorial; indeed, ancient legends circulate around this cavity. It seems that in the past it had had some kind of industrial or research activity.

Explored by the GELL between 1998 and 2005.