0028: Selvijo, Cueva del
Ozana 30T 454098 4794611 (Datum: ETRS89. Accuracy code: M) Altitude 265m
Length 245m Depth 10m
Area position

Updated 6th November 2003

The cave was revisited, extended and completely resurveyed in October 1995. The original description of an uninspiring, wet cave does not fit!

The deep, wooded entrance shakehole has a bank of tufa, the water from this has coated earth pellets to make "pearls". The low entrance chamber has too-tight passages to the left. The route to the right reaches a climb out of the stream to a chamber with calcite columns. To the left, a stooping passage rises to a choke, with a tighter route to the right which chokes to the left but continues down, unexplored.

The main passage swings to the right and encounters some fine sediment banks, with holes down to the very tight streamway below. To the left, a false-floored passage soon chokes. After a further 15m, another short passage on the left also chokes. The cave then lowers to a short, flat out crawl, entering larger passage on a bend.

After a further 15m, the passage divides at two 3m climbs down. The eastern climb encounters boulders and chokes in all directions. The southern passage contains avens. The climb down to the north enters a nicely shaped vadose passage which rises at the end and chokes very close to the main route already traversed.

A large male Lithobius deroutae Demange is described by Ortiz in Algunos crustaceous y miriapodas cavernicolas de la Region de Matienzo, Santander (Ortiz E, 1968).

References: Fernández Gutiérrez et al, 1966 (survey); Kendal Caving Club and Manchester University Speleological Society, 1975 (survey); Manchester University Speleological Society, 1982 (survey); Mills L D J and Waltham A C, 1981 (survey); Corrin J S and Smith P, 1981; Ortiz E, 1968
Entrance picture : yes
Underground picture(s): columns sediment survey
Detailed Survey : from 1965: low res  high res.  From 1995:  scale 1:1000
Line Survey :
On area survey : 1975 Ozana area map. Not a lot of detail. low res  high res
Survex file : yes (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)