Morphologically and chronologically interpreted cross-section of the Carmona area including the exposed studied section A and the three cored boreholes (B–D) with biostratigraphic and paleomagnetic information (white: reverse polarity; black: normal polarity). Red (dotted or continuous) line: inferred subaerial erosional surface. Vertical dotted lines: changes of direction of the broken line shown in Figure 4 B. Global polarity time scale (GPTS) from Ogg (2012).