Victoriano Pujalte (a), Alejandro Robador (b), Aitor Payros (a) & Josep María Samsó (c)
(a) Department of Stratigraphy and Paleontology, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Ap. 644, 48080 Bilbao, Spain. E-Mail: victoriano.pujalte@ehu.es
(b) Área de Cartografía Geocientífica, Instituto Geológico y Minero de España (IGME), La Calera 1, Tres Cantos, Madrid, Spain.
(c) Consulting Geologist, C/ Mayor 30, 1º, Jaca, Huesca, Spain.