(a) Location of the lithological outcrops and marble samples (n^o 26 to n^o 40) on the satellite map of the Ghlastropi hill quarry C24. The beige colour shows the areas covered by ruins or excavation debris, making the outcrops inaccessible; (b) 5000th scale geological map of the quarry C24. The red line locate the cross section A described below; (c) Cross section A located in quarry C24.