Updated 4th June 2002

A straight choked shaft. Twin shafts, marked with an "M" number and also sprayed 182.
The Sociedad Espeleológica Alto Duero have explored the site, naming it Sima M-34.

References: anon., 1980a (logbook); Corrin J S and Smith P, 1981; anon., 1990b (logbook); file; SEAD website
Entrance picture :
Underground picture(s):
Detailed Survey :
Line Survey :
On area survey :
Survex file :