The Carmona area. A, Geological map of the Carmona area at scale 1:50,000 (Borrero Dominguez and Roldán García, 1985). Localities studied by Aguirre et al. (2015): 1, Carmona Quarry; 2, Carmona Antena; Carmona Fútbol. Geological units: 3, Upper Tortonian marls. Messinian: 4, alternating blue marls and calcarenite; 5, sandy calcarenite. Quaternary: 7, grey clays; 10, conglomerates and sands; 11, clays and loams. B, Google Earth image of the Carmona area with the Caliza Tosca calcarenite, the Nested Sandstone Formation, and the studied exposed section (A) and boreholes (B, C, and D). Red broken line: composite cross-section shown in Figure 5.