Grotte e abissi nell'unità geologica La Baronia de Rialb
Estensioni: Alt Urgell, Noguera, Pallars Jussà
Fa parte della grande unità Prepirineu, dominata da calcare (46 %). Le sue grotte sono distribuite in Alt Urgell, Noguera, Pallars Jussà.
La Baronia de Rialb, la, in the Prepirineu, brings together 28 cavities: 18 caves and 10 pits, with 889 m of total passage and 54 m of maximum depth. Limestone ranges transitional between the Prepirineu and the plain, around Rialb.
Ci sono 28 cavità catalogate nell'unità geologica La Baronia de Rialb, tra cui 10 pozzi e 18 grotte. La più lunga è Avenc de la Roca del Corb (91 m).
Lo sviluppo conta ogni grotta una volta (un sistema conta una volta), e la profondità è quella della grotta più profonda, canyon esclusi.
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La Baronia de Rialb, la is a unit of the Prepirineu with 28 recorded cavities: 18 caves and 10 pits. The group totals 889 m of passage and reaches a maximum depth of 54 m. The lithologies present include Limestone (13), Conglomerate (12), Sandstone (1), Marl (1) and Travertine (1).
Among the cavities most notable for passage length are the Avenc de la Roca del Corb (91), the Pou dels Graells (70), the Pou del Dring (67), the Avenc d'en Viladrich (62) and the Font de Bulí (51). For depth, the Avenc de la Roca del Corb (54), the Pou dels Graells (40), the Avenc d'en Viladrich (38), the Avenc del Torrent Negre (31) and the Avenc del Castell de Tarabau (27) stand out.
The Pou dels Graells has an entrance of 23x4 metres and was first explored in December 1961 by the GES - CMB, which gave it 45 metres of depth; it was visited by C. Ribera and others in 1965. The Avenc d'en Viladrich was located by the GE Pedraforca on 14 February 1971. The Avenc del Torrent Negre, with an entrance 2 metres high and 1.5 wide, has been explored since 2004 and was the object of new explorations in 2021 and 2022.
Le 20 più lunghe
Le 20 più profonde
Mappa
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Fonte: Espeleoindex (espeleoindex.com), modificato. CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/