Grotte e abissi nell'unità geologica Rocacorba

Rocacorba is a unit of the Serralada Transversal, with 20 recorded cavities: 14 pits and 6 caves. The group reaches a total length of 1662 m and a maximum depth of 70 m. The lithologies present are Limestone (16) and Sandstone (4).

Among the cavities most notable for length are Bora Tuna, 403 m, known since ancient times and archaeologically excavated in 1922, and the Cova de Rocafesa, 400 m, with a labyrinthine passage occupied by blocks and a drop of -19 m. As for depth, the Avencs Nº7-8-9-10 del Pas dels Llops reaches 70 m, followed by the Avenc de Can Plana, 68 m, explored on 30 April 1972 by members of the SIRE–UEC (Gràcia).

Other relevant cavities are the Avencs Nº1 I 2 del Pas dels Llops, 46 m deep, explored by the GIS de Girona during Holy Week of 1972, and the Avenc Nº5 de Rocafesa, 18 m, explored by the GIS de Girona between the years 1973 and 1974.