UK-4
Cavity located in 1975 by G.E. Estella, with a wide entrance, a snow pit and a development of fossil galleries and an underground river down to -717 metres.
EspeleoWorld
UK-4
Cavity located in 1975 by G.E. Estella, with a wide entrance, a snow pit and a development of fossil galleries and an underground river down to -717 metres.
Isaba/Izaba
Sviluppo: 4600 m · Profondità: 717 m
Scheda aggiornata
https://espeleoworld.com/it/c/uk-4-isaba-izaba
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Cavity located in 1975 by G.E. Estella, with a wide entrance, a snow pit and a development of fossil galleries and an underground river down to -717 metres.
Descrizione
Morfologia
Wide entrance obstructed by a large snow pit. It has a 110-metre shaft; once the main shaft is abandoned, a narrow passage leads to a 39-metre vertical drop and to a meander of shafts down to -163 metres on one side and down to -205 metres on the other, which by means of structure gives onto a 43-metre shaft and continuity in a P-13, another P-13, P-5 and P-7, at -295 metres. A large fossil gallery on one side and vertical drops of 66, 10 and 16 metres meet the contact with the primary basement, where the galleries develop over some 4350 metres.
Idrologia
The galleries develop over some 4350 metres with an underground river down to -717 metres depth (waterfalls).
Storia
The aforementioned cavity was located in 1975 by G.E. Estella. In 1975, Institución Príncipe de Viana & Departamento de Obras Publicas. From 1987 to 2001, Amalgama and Belgas Centre Routier Spéléo (Brussels). In 1994, Amalgame (GSHP, GAS). In 1996, A.R.S.I.P. In 1997, Michel Douat, Amalgame, A.R.S.I.P., Monein. In 2001, Investigación Larra Satorrak.
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Fonte: Gobierno de Navarra – Catálogo espeleológico de Navarra (datosabiertos.navarra.es), modificato. CC BY 4.0, https://creativecommons.org/licenses/by/4.0/ Gobierno de Navarra · dati aggiornati a 2022