Caves and potholes in the Cadí - Moixeró geological unit

Cadí - Moixeró is a unit of the Prepirineu formed by an imposing limestone barrier, with walls of more than a thousand metres and a high-altitude karst that contains deep pits. The catalogue records 107 cavities: 47 pits and 60 caves, with a total passage of 3,778 m and a maximum depth of 188 m. The lithologies present are Limestone (106 cavities) and Travertine (1).

Among the longest cavities are the Grallera del Carabasser, with 470 m of passage and 166 m of depth at the Pedraforca (Saldes), which begins with a 34 m shaft and reaches the -166 level; the Antic Bullidor, with 398 m at Gisclareny, discovered in 1989 by the SIES – CCR l'Avenç and explored down to the -188 m level in 2016; and the Forat de les Olles, with 268 m of passage and a total height difference of +8/-52 m at the Pedraforca (Saldes).

As for depth, notable are the Antic Bullidor (188 m), the Grallera del Carabasser (166 m), the Graller de Roca Cerdana (96 m, located in 1983, with a 95 m shaft of height difference), the Grallera Gran del Boixeder (81 m) and the Forat de les Olles (60 m). Other cavities are the Baborell de Montsec, with 143 m of passage and 18 m of height difference near coll d'Arnat, and the Graller de Roca Cerdana, with 130 m of passage.