Fig. 6

Photomicrographs of selected thin sections, showing variability of mineralogy, texture and grain size within and across different quarries and buildings, different decay patterns within building stones, and highlighting some common mineral components. GA1 and GA2 taken from same quarry face show high level of petrographic and physical variation, neither is similar in texture to building stone samples. QF3 is more similar to building stone, but shows high porosity with some suggestion of bedding direction. TOL and WT2 show evidence of varying decay phenomena. RS1 shows some of the minerals described in this study