Basalt Caves in Catalonia
Basalt is volcanic rock, and the cavities that form in it —lava tubes— have nothing to do with karst dissolution: they form when the surface of a lava flow cools and solidifies while the molten material inside keeps flowing and empties out the conduit. In Catalonia this lithology is tied to the volcanic areas of Garrotxa, with a very small but geologically unique number of cavities.
The catalogue includes 1 cavitat with Basalt lithology, concentrated in Olot. Cova de les Feixes, amb 18 m de recorregut.
The surveyed length on record is 18 metres. The depth on record is 1 metres. You can check the full entry for location, access and, where available, photographs and survey maps. The whole set of caves on this page can also be downloaded as CSV or JSON.
La litologia Basalt és una roca ígnia volcànica; les cavitats que s'hi formen (tubs de lava) responen a un procés de refredament molt diferent del càrstic habitual.
