Fig. 8From: In situ investigation of stone heritage sites for conservation purposes: a case study of the Székesfehérvár Ruin Garden in HungaryProfiles of the different lithotypes measured in situ showing the average values of the demanded drilling forces versus the drilled depth from the surface to the interior of the material: oolitic limestone (OL), shelly limestone (SL), sandy calcarenite (SC), red limestone (RL), foraminifera-bearing limestone (FL), travertine (T), rhyolite (Rh) and marble (M)Back to article page