Figure 1

The main volcanic features of the SVVC14, 44, 45 with geographical names and topography produced from a digital elevation model57 using Surfer (version 14; http://www.goldensoftware.com/). Dashed lines refer to sectors of inferred plinian calderas that would have been removed by subsequent caldera forming events. The trajectories of the vertical sections shown in Fig. 3 are indicated by blue lines.