Fig. 2: Morphology of four classes of volcanoes in the Eridania region.

a,b,c,d, Type examples of a volcanic dome (a), stratovolcano (b), pyroclastic shield (c) and caldera complex (d) are shown with MOLA/HRSC elevation data draped over Mars Context Imager data. e, Topographic profiles of each feature represent SW–NE profile lines at each site. Scale bars, 5 km.