1. Unidad Asociada UVA-CSIC al Centro de Astrobiología; University of Valladolid; Parque Tecnológico Boecillo 47151 Valladolid Spain
2. Water Resources and Environmental Geology Research Group; Department of Biology and Geology-University of Almería; Ctra. Sacramento s/n, La Cañada de San Urbano 04120 Almería Spain
3. Italian Institute of Speleology, Department of Biological, Geological and Environmental Sciences; University of Bologna; Via Zamboni, 67 40126 Bologna Italy
4. Department of Geology; University of Oviedo; Arias de Velasco s/n. 30005 Oviedo Spain
5. Centre de Recherche en Géochimie et Géodynamique (GÉOTOP-UQAM)-McGill University; Montreal Canada
6. Instituto Andaluz de Ciencias de la Tierra; Camino del Jueves s/n 18100 Armilla Granad Spain