Geosites assessment in a volcanic hotspot environment and its impact on geotourism, Santa Cruz-Galapagos Islands, Ecuador oleh Paúl Carrión-Mero, Emily Sánchez-Zambrano, Josep Mata-Perelló, María Jaya-Montalvo, Gricelda Herrera-Franco, Edgar Berrezueta, Ramón L. Espinel, Milena Baque, Fernando Morante-Carballo