1. Department of Analytical Chemistry, University of Málaga, E-29071 Málaga, Spain (J.C., F.J.F., L.M.C., J.J.L.); Department of Geology, University of Málaga, E-29071 Málaga, Spain (F.C.); and Foundation Cueva de Nerja, E-29787 Nerja, Spain (F.C., M.D.S.)