Updated 25th September 2018; 26th June, 18th November 2022

The information below has been roughly translated from the French, Spéléo-Club Dijon reference, Simonnot G, 2018. The length is taken from the reconstructed Survex file.

In the valley bottom of Vallina (wooded area), just north of a meadow and a house in ruins.
At the bottom of the entrance projection (-3) a window exhales a strong stream of air snoring in summer; opened through the blocks of a very unstable chute, it gives on a first enlargement. A new slope, unobstructed at its summit, leads to a short section of gallery and at the top of the Nonosse pitch.
A beautiful gallery of 3 to 5 m high, facing north, unfortunately ends quickly on clogging fills and concretions. A temporary circulation has cut through the thick layer of sediment and is lost in impenetrable cracks (no draft).
It is at height that the disobstructions of the passage Rahan allowed to advance a little in a set of ducts staged over a dozen meters. The current of air comes from an impenetrable ascending diaclase without major work (-3).
The torca seems, because of its proximity, in relation with the very big Cueva Vallina. It is impossible, however, to say whether the current of air comes from the known parts of this cavity (north-west) or from a still unknown sector (north-east, east).

The site was surveyed in 2011.

References: anon., 2016a (January, February logbook); Simonnot G, 2016; Simonnot G, 2018; Simonnot G, 2022
Entrance pictures :
Underground pictures :
Video :
Detailed survey : yes
Line Survey :
On area survey :
Survex file : Reconstructed from the 2011 survey