026 Cueva de Tiva
Cubillas VN52929620 Alt. 175m Length included with Risco (25)

Updated 19th February 1999

The impressive twin entrances lead to a series of dry, abandoned passages that eventually unite, the way on being through a draughting bedding plane on the left. This passes under several avens before increasing in height at the top of a steep slope. This leads down to water level and a sump. A 10m climb up leads to a chamber with sandstone walls. At the far end, a pitch of 11m drops into an impressive streamway carrying the water from Sima-Cueva del Risco (025). The 1.5km of passage in this area is a three dimensional maze and almost impossible to describe. All ways eventually unite and the way on is in chest deep water up several cascades until daylight can be seen from Torca del Sedo, the entrance to Sima-Cueva del Risco (025). This is an 8m pitch and has been free climbed.

A dye test in 1964 showed water from Sima-Cueva del Risco resurging after five hours from La Lisa below Cueva de Gonzales (014), Cueva de Transformador (032) and in this cave.

Ortiz in Algunos crustaceous y miriapodas cavernicolas de la Region de Matienzo, Santander (Ortiz E, 1968) describes two male Lithobius, collected in 1966.

References: Fernández Gutiérrez Juan Carlos, 1965; Fernández Gutiérrez et al, 1966 (survey); anon., 1974b (logbook); anon., 1974a; Cox G, 1973; anon., 1975a; anon., 1975b (logbook); Kendal Caving Club and Manchester University Speleological Society, 1975 (survey); Manchester University Speleological Society, 1982 (survey); Mills L D J, 1981; Corrin J S and Smith P, 1981; material in file; Ortiz E, 1968; García José León, 1997 (survey and photo) (See 025 Risco)
Entrance picture :
Underground picture(s):
Detailed Survey :
Line Survey :
On area survey : 1975 Ozana area map. Not a lot of detail.
Survex file :