Fig. 7From: In situ investigation of stone heritage sites for conservation purposes: a case study of the Székesfehérvár Ruin Garden in HungaryProfiles of the average values of demanded drilling forces versus the drilled depth from the surface to the interior of the material for representative blocks of oolitic limestones tested in situ; block 27 was located in the unprotected area of the monument and it was exposed to the exterior environmental conditions, while blocks 8 and 10 were located in the sheltered areas of the siteBack to article page