Forat de Sant Tomàs

Avenc de 34 metres de fondària a Castelló de Farfanya.

Castelló de Farfanya • Noguera97m34m

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Forat de Sant Tomàs

Avenc de 34 metres de fondària a Castelló de Farfanya.

Castelló de Farfanya · Noguera

Length: 97 m · Depth: 34 m

Updated record

https://espeleoworld.com/en/c/forat-de-sant-tomas

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 34-metre-deep pit in Castelló de Farfanya, explored on 21 March 1971 by the RES - CE Pirenaic.

Characteristics

Type: Pothole
Municipality: Castelló de Farfanya
Region: Noguera
Unit: Serres marginals - Oest
Length: 97 meters
Depth: 34 meters
Major Unit: Prepirineu
Lithology: Limestone
Last review: 2012-11-17

Location

On the C-12 road from Balaguer to Àger, about 250 metres after passing kilometre 177, we will take a track on the right that leads to the Sant Tomàs farm; after 550 metres we will reach a water pool that lies to the right of the track, on the left there is a field of crops. We will go as far as the north-easternmost part of this crop field; from here a path sets off climbing towards the N; after about 250 metres we will head towards the W following the ridge, where within a hundred metres we will find a sign for a Hunting Reserve; from here we will head towards the cliff in a SW direction, finding the cavity halfway up the cliff, quite close to the aforementioned sign.

Approximate coordinates without excessive reliability.

Entrances

Always verify coordinates and access conditions before setting out.

Sant Tomàs, Forat de
Elevation: 520 m
41.849330, 0.744280
UTM 31T (ED 50) 312835 4635711
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Topographic

Forat de Sant Tomàs - Topography, Castelló de Farfanya, Noguera

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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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Description

Morphology

The cavity begins with a series of ramps cut by vertical steps, one of them quite narrow, which lead to a 3-metre drop where contact is made with the main fissure of the cavity; a second drop of 6.5 metres places us at the base of the fissure. In an E direction, the cavity continues for some 25 metres until it becomes impenetrable at the point where the change of materials occurs. In a W direction, and after climbing about 6 metres, one can reach another stepped vertical of 10 metres, followed by another of 5 metres, where it ends in the form of a meander obstructed by a stalagmitic flow.

Speleothems

The final meander is obstructed by a stalagmitic flow.

Progression

It begins with a series of ramps cut by vertical steps, one of them quite narrow, which lead to a 3-metre drop where contact is made with the main fissure of the cavity; a second drop of 6.5 metres places us at the base of the fissure. In an E direction, the cavity continues for some 25 metres until it becomes impenetrable at the point where the change of materials occurs. In a W direction, and after climbing about 6 metres, one can reach another stepped vertical of 10 metres, followed by another of 5 metres, where it ends in the form of a meander obstructed by a stalagmitic flow.

History

The first exploration took place on Sunday 21 March 1971 by members of the RES - CE Pirenaic (Barcelona) based on the indications received from the local people. They had to carry out a dig to be able to get through.

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Bibliography

Gàzquez i Pons, Josep Lluis, (1995).-”Catàleg Espeleològic de la Noguera” Grallera (3-4):1-90. GE Lleidatà. Lleida.
Navarro; Vela.(1971).-”Cuatro primeras para el R.E.S.” Butll. Centre Exc. Pirenaic (190). Barcelona.