1. Department of Geology and Underground, Instituto Geológico y Minero de España - CSIC, Madrid, Spain
2. Department of Geology and Underground, IGME - CSIC, Salamanca, Spain
3. Ferrovial Agroman SA, Madrid, Spain
4. Department of Geology and Underground, IGME - CSIC, Oviedo, Spain
5. Institut für Geowissenchaften, FIERCE, Goethe University, Frankfurt am Main, Germany