0496: Casasierra, Cubío de la
El Naso 30T 450878 4796960 (Datum: ETRS89. Accuracy code: G) Altitude 453m
Length 30m Depth 30m
Area position

Updated 8th November 2000; 21st May 2017

A strongly draughting 10m pitch leads to a window to a 15m shaft. This drops into a tight rift. A 5m climb up at the bottom leads to a blind window. A small trench below the last pitch can be followed to a too tight rift. At the start of the trench is a narrow rift which drops into a small chamber with no outlet.
    Part way down the first pitch a step off leads to a small chamber and a short, choked 5m pitch. The draught is lost.
    When partly explored at Easter 2017, it was noted that the draught was warm and so presumed to come from a nearby shakehole.

References: anon., 1985a (Easter logbook); anon., 1994a (Easter logbook); anon., 2000c (Summer logbook); anon., 2017b (Easter logbook)
Entrance picture : yes
Underground picture(s):
Detailed Survey :
Line Survey :
On area survey :
Survex file :