1. Geoheritage Commission of the Spanish Geological Society, Society for the Defence of Geological and Mining Heritage and ProGEO, Madariaga Dorretxea San Bartolome auzoa 34-34, 48350 Busturia, Basque Country, Spain
2. Geoheritage Commission of the Spanish Geological Society, Society for the Defence of Geological and Mining Heritage and Geology Research Group, Faculty of Chemistry, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain
3. Geoheritage Commission of the Spanish Geological Society, Society for the Defence of Geological and Mining Heritage, ProGEO and CSIC-IGME, Rios Rosas, 23, 28003 Madrid, Spain
4. Geoheritage Commission of the Spanish Geological Society and Directorate General for the Natural Environment and Biodiversity, Government of Catalunya, del Foc street, 57, 08038 Barcelona, Spain
5. Institute of Earth Sciences and ProGEO, pole of the University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal