RT Book, Section T1 Geomorphologic evidences of flank instabilities in the eastern sector of the tejeda volcano (Canary Islands, Spain) during the quaternary A1 Yepes Temiño, Jorge A1 Rodríguez Peces, Martín Jesús A1 Sánchez, Nieves A1 Galindo, Inés A1 Del Potro, Rodrigo A2 Margottini, Claudio A2 Canuti, Paolo A2 Sassa, Kyoji AB This paper provides both geological and geomorphologic observations that support the existence of flank instabilities in the eastern sector of the Tejeda Volcano (Gran Canaria) during the Quaternary. The observations are focused on the analysis of the drainage system, scarps, erosion surfaces, residual reliefs, field of volcanoes and lithological correlation between the surface geology and data derived from wells and boreholes. We have identified a wide paleo-valley developed in Miocene volcanic materials, which could be related to a large rock slide, as well as a subsequent secondary scarp of Pliocene age developed at the distal area of the slide mass. These observations confirm the occurrence of large insular flank collapses of the Tejeda Volcano during the Miocene to Pliocene. These flank instabilities suggest a NE-SW extensional regime, which could be related to a NW-SE fault zone that divides Gran Canaria Island into two sectors. PB Springer-Verlag SN 9783642313127 YR 2013 FD 2013-09 LK https://hdl.handle.net/20.500.14352/36037 UL https://hdl.handle.net/20.500.14352/36037 LA eng NO © Springer-Verlag Berlin Heidelberg 2013 DS Docta Complutense RD 8 jun 2025