Grotte e abissi nell'unità geologica L'Empordà

L'Empordà, l' is a unit of the Prepirineu with 13 recorded cavities: 7 pits and 6 caves. The total length is 528 m and the maximum depth is 52 m. The lithologies present are Limestone (10) and Travertine (3).

The limestone reliefs of Alt Empordà, at the foot of the eastern Prepirineu, include scattered caves. The longest cavity is the Avenc de la Calma, with 175 m, which is also the deepest, with 52 m of depth in Llers, Alt Empordà, with the Sala Gran of 15x6 metres and two routes, the CEE and the GEIS. Other notable cavities are the Avenc de Can Vilà, of 62 m of passage and 26 m of depth in Terrades (Alt Empordà), explored in 1976 by the GEIS de Figueres; the Cau del Ciri, of 52 m of passage and 12 metres of depth in Sant Llorenç de la Muga, known since time immemorial and cited by N. Font i Sagué in 1897; the Bora Major, a cave of about 45 m of passage in Terrades (Alt Empordà); and the Bauma de Taleixà, of 42 m of passage and 18 m of depth in Terrades (Alt Empordà), with a shaft of inclined walls and about 16 m of drop.

Among the deepest cavities is the Avenc del Boquerol d'en Vidal, unpublished and of about 20 or 25 m of depth in the Garriga d'Empordà (Vilanant), with concretions of crystallized calcite.