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Fig. 3. Photomicrographs of the weathered core material from areas 1 and 3 at the study site. a) Differential weathering of the interbedded shale and sandstone at 4.9 m from FWB24 in area 3 (Note shale is showing greater weathering compared with sandstone). b) Shale from zone 5 of FWB100 at 12 m showing calcite veins. c) Iron-rich sandstone from zone 5 of FWB100 at 12 m. d) Clayey zone from FWB21 from area 1 at 5.8 m. e) Highly weathered saprolite showing Fe oxides and clay adjacent to the clayey zone in (D) at 5.9 m.
