Caves and potholes in the El Montsant geological unit

Montsant, within the Serralada Prelitoral, contains 147 cavities: 69 pits and 78 caves, with a total passage of 9,261 metres and a maximum depth of 85 metres. The dominant lithology is conglomerate (139 cavities), with dolomite (4), limestone (3) and travertine (1).

Among the longest cavities are the Avenc de l'Aisling, with 871 metres of passage and 53 m of depth at the Morera de Montsant, explored by the GELL in 1995; the Cova de les Campanes, with 800 metres of passage and 70 m of depth at the Morera de Montsant; the Cova de la Taverna, with 472 metres of passage at Margalef; the Avenc del Vent, with 417 metres of passage and 39 m of depth at Ulldemolins, and the Avenc del Púdol, with 380 metres of passage and 85 m of depth at Margalef, with two entrances separated by 12 metres.

The deepest cavities include the Avenc del Púdol (85 m), the Cova de les Campanes (70 m), the Avenc dels Despropòsits (56 m) at Ulldemolins, discovered and explored in March 1998 by members of the AAEET de Valls, and the Avenc de l'Aisling (53 m).