Grotte di Amer

Amer, a municipality in the comarca of the Selva, has 9 inventoried cavities: 3 pits and 6 caves. Together they total 157 metres of length and reach a maximum depth of 14 metres. The lithologies represented are limestone (4), sandstone (3), schist (1) and marl (1).

The longest cavity is the Cova de les Guilloteres, with 47 metres of length and 12 metres of vertical drop, explored by the GEB on 12 December 1993. It is followed by the Esquerda de l'Infern, with 36 metres of length and a maximum vertical drop of 6.7 metres, related to the Amer fault, and the Forat de la Terra Blanca, with 28 metres of length. Other cavities are the Avenc de les Roques del Corb, with 16 metres of length, and the Cova del Turó de la Crosa, with 8 metres.

As for depth, the Forat de la Terra Blanca is the deepest, at 14 metres, explored by the GEB on 11 December 1993. It is followed by the Avenc de les Roques del Corb, with a depth of 13 metres, with an oval entrance and a shaft of -11 metres, and the Cova de les Guilloteres, at 12 metres. The list is completed by the Esquerda de l'Infern, at 6 metres, and the Cova Nº3 de Santa Brígida, at 3 metres.