039 Cueva de la Codisera
Ozana VN52689455 Alt. 503m Length 2380m Depth 144m

Updated 30th August 1998; 19th February 1999; 17th September 2000

Note that the survey needs amending as leg 13 - 14 across the traverse should be reversed to agree with the 2000 resurvey to the surface shafts.

A large, goat-sheltering entrance at the head of a valley leads to an enormous vadose canyon. The passage levels out at the base of the entrance slope and meets a 5m pot.

At the bottom, about 70m of passage runs in both directions, mostly below the main passage. As the roof of the lower passage is boulders, it looks as if it is only these which separate the two passages. Towards the entrance, the passage slopes up after a 3m climb down, and ends at a crawl and choke. In the opposite direction the passage ends at a boulder choke.

A walk round the left of the pot leads to an alcove on the right with charcoal and some pottery. The first lake is meet shortly after this with a inlet passage high on the right hand wall which should be bolted to. Further in, a ledge on the left provides access to a high level gallery, Galeria de las 400 Pesetas, running off on the right. One hundred metres along this route, on the left, three shafts enter from the surface, 40m above. The gallery reduces in size until a 90m shaft is reached. At the base is a narrow streamway. An awkward traverse over the pitch leads to a continuation of the passage and "further 95m pitches", explored in 1988. The re-exploration of this area, started in Easter 1994 and continued in the summer, discovered a major extension after traversing over the main shaft to a second pit.

Thirty five metres down the shaft, on the north side, a large passage can be swung into. The 6 x 5m stomp chokes after some 80m. A passage to east can be traversed into which chokes after 10m. Directly opposite the northern passage is the large entry to the southern passage which can be gained by a traverse. This large passage chokes after 230m after passing through a 30m wide chamber. This level, at an altitude of about 440m, appears to come close to the surface at the head of the massive valley which runs south behind Codisera. A weak molephone link was achieved between the passage above and the surface.

Back in the vadose canyon, the floor slopes down to a 25m pitch, Sima de las Chinas which lands in another large level.

Heading north, "upstream", a calcite slope leads to the base of a chimney which is free-climbed. A rift heads back towards the Chinas shaft and ends at a boulder choke. Continuing upstream, a short may-pole pitch goes to another short pitch down, and a calcite choke. This lies below the entrance passage, and is probably related to the segment of passage below the 5m pot.

At the base of Sima de las Chinas a large amount of bones are mainly of deer. The main passage slopes down over boulders and slippery calcite. A side passage on the left contains a few bones - the remains of a bear; in 1964, S.E.S.S. reported this as the complete skeleton of a young Ursus speleus. This passage ends at a small aven on the left and a hole connecting with the main passage.

The main route continues through a strongly draughting crawl, shortly after which it turns sharp right. On the left at this corner there is a climb with two small chambers and a may-pole climb on the right to about 20m of unsurveyed passage. Traversing over the first climb leads to the awkward Popcorn Climb, the start of Quality Time. Sixty metres of passage and a crawl lead to a 5m free-climb down into a large chamber. A rift passage in the roof over this climb has been may-poled into, but didn't go very far. On the right of the chamber, a large aven is very near the second 95m shaft in the Galeria de las 400 Pesetas, but has no voice connection. Opposite the climb down, another climb up goes into a chamber with two sections of old passage going roughly north and south.

Returning to the main passage, this continues to trend downhill, and an inlet on the left is too small to be followed very far. The passage develops into a wide bedding and opens out in a large chamber with a rubble slope at the angle of rest. On the right a side passage leads to two avens with possible passage at the top. Bolting started here in 1998. At the base of the rubble slope the stream is met, supposedly coming from the passage at the base of the 90m shaft. This can only be followed for about 30m through smaller passage, ending at a chamber with a couple of uninspiring digs.

Just before Sima de las Chinas a passage can be seen high on the right hand wall. This hasn't been entered but it seems to be heading towards the Galeria de los 400 Pesetas. On the left hand wall, just before the same pitch is a "passage" which proved to be an alcove after bolting. (Pictures 1  2).

The Sima de las Chinas can be traversed along the left hand wall, ending in a 7m pitch to the passage floor. Straight ahead, a boulder slope leads up to a large passage ending abruptly at a boulder run-in up to the roof. The survey shows this to be directly below Galeria de las 400 Pesetas. On the left at the end of the traverse there is a loop, which re-enters the passage at the top of the boulder slope. Several side passages off the loop all choke; one ends within 10m of the northern passage in the 1994 extension. A rift crosses over in the roof of the loop. It is blocked by a boulder but can be seen to continue.

Much potential remains such as a possible link with Cueva del Coverón (002).

A bolt climb in the entrance, to reach a suspected passage, yielded 10m to a sandy choke.

Ortiz (AM) lists two crustaceans: Stenasellus cf. virei Dollfus and Pseudoniphargus africanus Chevreux, while Pinto (AF) includes Cantabroniscus sanmigueliensis among the fauna. The bats Rhinolophus ferrumequinum and Barbastella barbastellus are recorded by Meijide (AY).

Pinto found Iron Age pottery in the area before the first lake in 1978. In 1981 a copper arrowhead, dated in the Bronze Age, was found at the top of the climb starting the 400 Pesetas Gallery. A fibula has also been found. A page of photographs showing some of the archaeological remains can be seen here.

Morlote Jose M et al, 1995 describe Codisera as one of the Iron Age sepulchral caves in the area.

Shaft entry
The surface pitch is marked 78 with an orange cow tag. Go between two upright rocks and use the natural belays (10m rope needed in total). First pitch is 28m to a slope of 4m to a second pitch of 26m. One rope will do as there is little rub. Follow the slope down to a flat-floored rift and "crab" through 4m to 400 Pesetas Gallery.

References: Fernández Gutiérrez et al, 1966 (survey and photo); Kendal Caving Club and Manchester University Speleological Society, 1975 (photo) /anon., 1976 (logbook); Fernández Gutiérrez J C, 1975; Manchester University Speleological Society, 1982; Cox G, 1973; Mills L D J and Waltham A C, 1981 (survey); Corrin J S and Smith P, 1981; Corrin J, 1983c; anon., 1983b (logbook); anon., 1984 (logbook); Barrington P and Hanson D, 1984; anon., 1985b (logbook); Pinto A and Canales F, 1985 (survey); Corrin J, 1992b (survey); anon., 1986 (logbook); Smith P, 1985 (survey); anon., 1987 (logbook); anon., 1988 (logbook); Smith P, 1983; Ortiz E, 1968; Meijide Calvo M, 1982; Davis J and Corrin J, 1989; material in file; anon., 1994a (Easter logbook); anon., 1994b (logbook); Neill A, 1994; Corrin J, 1994b (survey and photo); anon., 1995c (logbook); Corrin Juan, 1995a; Morlote Jose M et al, 1995; anon., 1998d (logbook); Morlote Jose M et al, 1995; Corrin Juan, 1999; García José León, 1997 (survey); Corrin Juan, 1997c; anon., 2000c (Summer logbook)  
Entrance picture :
Underground picture(s): Looking out to entrance  bolting above Chinas 1  2
Detailed Survey : 1:1000
Line Survey :
On area survey :
Survex file :