Grotte della Ribera d'Ebre

The Ribera d'Ebre region contains 41 cavities, distributed as 19 pits and 22 caves, with a total length of 1656 m and a maximum depth of 74 m. The lithologies present are dolomite (21), limestone (18), sandstone (1) and marl (1).

Among the longest cavities are the Avenc Miravet, at 283 m; the Avenc de la Picossa, at 188 m; the Cova del Janet, at 130 m; the Esquerda Estreta de Mont-redon, at 114 m, and the Cova Llúdriga, at about 100 m. As for depth, the Esquerda Estreta de Mont-redon reaches 74 m; the Avenc Miravet, 43 m; the Avenc de l'Espadella, 42 m, with a point of maximum depth at -42.6 m; the Avenc de la Picossa, 32 m, and the Avenc Pena-roja, 32 m.