Avenc Negre

A 41 m deep fissure at el Port (Horta de Sant Joan), SW of la Mola dels Atans, in the upper area of the barranc dels Cubars.

Horta de Sant Joan • Terra Alta 80m 41m

EspeleoWorld

Avenc Negre

A 41 m deep fissure at el Port (Horta de Sant Joan), SW of la Mola dels Atans, in the upper area of the barranc dels Cubars.

Horta de Sant Joan · Terra Alta

Length: 80 m · Depth: 41 m

Updated record

https://espeleoworld.com/en/c/avenc-negre-horta-de-sant-joan

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 41 m deep fissure at el Port (Horta de Sant Joan), SW of la Mola dels Atans, in the upper area of the barranc dels Cubars.

Characteristics

Type: Pothole
Municipality: Horta de Sant Joan
Region: Terra Alta
Unit: Port, el
Length: 80 meters
Depth: 41 meters
Major Unit: Serralada Prelitoral
Lithology: Dolomite
Updated on EspeleoÍndex: November 17, 2012

Location

SW of la Mola dels Atans, in the upper area of the barranc dels Cubars. The entrance lies in the middle of a very steep slope.

Approximate coordinates and a low-precision location, taken from the data provided by its first, and possibly only, explorers.

Entrances

Always verify coordinates and access conditions before setting out.

Negre, Avenc
Elevation: 905 m
40.927040, 0.356040
UTM 31T (ED 50) 277470 4534227
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Topographic

Avenc Negre - Topography, Horta de Sant Joan, Terra Alta

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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

A typical collapse fissure formed along a NW – SE trending fracture, affected by a significant clastic process. From the -21 level the joint becomes narrower and more elongated, notably hindering the descent, and it can reach 41 metres of depth where progression becomes impracticable, although the fissure can be seen to continue descending some 10 metres further.

History

Discovered and explored by members of the now-defunct Speleology Section of the GM GELERA (Barcelona) during a visit to the Gilaberta massif (el Port) in May 1977.