Interpretative cross sections based on CTX topographic profiles extracted from the CTX DTM B10_013572_1789_XI_01S018W__G12_022710_1794_XN_00S018W_dtm of Belén crater in Iani Chaos. The sections show the geomorphological units and the locations of mineral groups (boxes) corresponding to spectral units identified from CRISM data (see Figures 5–7 and Table 1 for reference). The vertical line with the dot on top, centered on each profile, represents the intersection point of all three profiles (see Figure 2). Question marks in the schematic diagrams indicate uncertainties in the crater depth and the extent of possible listric faults.