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Figure 5: a) Diagram of a shaft with horizontal galleries that follow the raw material nodules in order to exploit them; b) Mouth of one of the vertical shafts, emptied by the present quarrying activity; c) Sub-quadrangular shaft excavated in the 1992-93 rescue survey, showing the original different levels of the horizontal work, made by picking during their construction and d) The modern quarry in 2003 that cut two levels of galleries and many vertical shafts in Zone 2 of the Jadramil site, viewed from the front.