LS22

The cavity appears to have formed at the intersection of two joints. Several entrances, initially all infilled with rubble, converge toward -3 m. A 10 m shaft leads to a comfortable ledge from which the parallel shafts start. The main shaft continues with a fine 16 m vertical drop presenting a fine volume and leading to the top of a large snow deposit. One can descend on both sides of the snow deposit, but the chamber, quite vast, is infilled on all sides and shows no continuation. Downward, the shaft splits: a P11 is rapidly infilled with snow while the main shaft descends for 20 metres to a small snow deposit. At this level, a window measuring 20 x 80 cm and in the direction of the fault might possibly be diggable. A final P13 leads to the bottom of the pit.

The very noticeable draught prompted a rapid digging operation. Access to the parallel shaft is delicate because of an unstable, steeply inclined rubble slope. The shaft opens upward to the surface, but the passage would require a short digging operation. At the bottom of the pit, the draught filters through a fault infilled with rubble.

Only the part explored in 2012 has been surveyed. The stated development is therefore an estimate.

Source: Echo des Vulcains n°66, mars 2009, page 58: https://www.groupe-speleo-vulcain.com/publications/echo-des-vulcains/

Source: Echo des Vulcains n°70, avril 2013, page 40: https://www.groupe-speleo-vulcain.com/publications/echo-des-vulcains/