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Fig. 1 | Heritage Science

Fig. 1

From: On-site monitoring of the performance of innovative treatments for marble conservation in architectural heritage

Fig. 1

State of conservation of Candoglia: a erosion and differential erosion in presence of stone heterogeneity (arrow indicates a quartz-siliceous vein); b eroded calcite grains and dark stripe-like biological colonization (digital microscope documentation); c black thick sulphatic deposit in an area sheltered by rainfall. State of conservation of Crevoladossola: d photographic documentation of a stone block showing the presence of areas with colour alteration [1] and surface recession [2] due to the erosive effect of the rainfall; e ESEM documentation of the altered stone surface with corroded grain boundaries and cleavage planes; f ESEM documentation of a polished cross-section with micro-cracks crossing the grains and partially filled with soil dust and particulate matter (indicated by the white arrow)

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