Avenc del Marianet

Small 26 m deep pit in Garraf (Gavà), located about 200 metres NE of avenc de la Llosa, discovered and first explored on 26 January 1949.

Gavà • Baix Llobregat 30m 26m

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Avenc del Marianet

Small 26 m deep pit in Garraf (Gavà), located about 200 metres NE of avenc de la Llosa, discovered and first explored on 26 January 1949.

Gavà · Baix Llobregat

Length: 30 m · Depth: 26 m

Updated record

https://espeleoworld.com/en/c/avenc-del-marianet

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 26 m deep pit in Garraf (Gavà), located about 200 metres NE of avenc de la Llosa, discovered and first explored on 26 January 1949.

Characteristics

Type: Pothole
Municipality: Gavà
Region: Baix Llobregat
Unit: Garraf, el
Length: 30 meters
Depth: 26 meters
Major Unit: Serralada Litoral
Lithology: Dolomite
Updated on EspeleoÍndex: November 17, 2012

Location

It is located about 200 metres NE of avenc de la Llosa. From this pit the ravine can be followed upstream without losing height, but through a thick scrub of kermes oak. On reaching the height of a small stone hut situated above us, if we draw a perpendicular line between it and the bottom of the ravine, the pit is found about 25 metres above the thalweg of the right slope of the head of the Sot de l'Infern. Years ago, the point where the pit opens was a small clearing right in the middle of the kermes oaks.

For more than 50 years, all the Alpina maps and catalogues wrongly placed it on the left slope of the gully, more or less just below the itinerary to go to avenc de la Sivinota, when in reality it is on the opposite slope.

Entrances

Always verify coordinates and access conditions before setting out.

Avenc del Marianet
Elevation: 431 m
41.290741, 1.927330
UTM 31T (ED 50) 410278 4571792
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Topographic

Avenc del Marianet - Topography, Gavà, Baix Llobregat

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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

Avenc del Marianet - Photo, Gavà, Baix Llobregat

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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

Through a small entrance one enters a single shaft 26 metres deep, bell-shaped and with a ledge at 17 metres from its start. Below it, the rest of the shaft has a greater volume.

Speleothems

A fairly important lithogenic process has developed.

History

The discovery and first exploration was carried out by J.Montoriol and F.Vicens, of the GES-CMB, on 26 January 1949.

We have always thought that there was an error on the part of the first explorers when transcribing the record sheet of this cavity and that of Avenc de la Llosa and they swapped the name of one for the other. Possibly, the Marianet was the shepherd who indicated to them the one catalogued as Avenc de la Llosa and yet the one catalogued with his name has a smooth rock, like a slab, at its entrance.

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Bibliography

Borràs, J. (1974).- Catálogo espeleológico del macizo de Garraf. Vol. II. 166 pp. Barcelona.

Montoriol, J. (1954).- “La hidrología kárstica del Pla de les Basses y sus relaciones con la de otras zonas del macizo de Garraf (Barcelona)” Speleon. T. V (1-2): 55-104. Universidad de Oviedo.