Fig. 5From: Permeability anisotropy in sandstones from the Soultz-sous-Forêts geothermal reservoir (France): implications for large-scale fluid flow modellingMicrostructural images of the seven cores investigated in this study (shown in Fig. 3) taken using an optical microscope under reflected light. a Sample 176. b Sample 189. c Sample 190. d Sample 254. e Sample 254. f Sample 257. g Sample 285. h Sample 356Back to article page