Abandoned mine tailings affecting riverbed sediments in the Cartagena?La Union district, mediterranean coastal area (Spain) - Tomás Martín-Crespo; David Gómez-Ortiz; Silvia Martín-Velázquez; Pedro Martínez-Pagán; Cristina de Ignacio-San José; Javier Lillo; Ángel Faz (Remote Sensing, 2020)