Avenc H.2 d'Aulà

The entrance is located at the lowest point of a sunken doline 8 metres deep. Here there is a 5-metre shaft among unstable blocks. A further 11-metre shaft follows, also very dangerous because of the blocks that partially obstruct it, as with the next shaft, of 12 metres. At the bottom of this one, a ledge is reached at elevation -36, from which two new shafts start, one of 6 metres that emerges through a narrow window into the other, which is 20 metres deep and has much wider dimensions. Its base, on a slight slope and full of debris, represents the point of maximum depth at elevation -59.

After the first reconnaissance of the cavity down to -12, these blocks fell and a hard day of digging was needed.