Figure 15: Pinda Group. The paragenetic sequence documented in the photomicrograph of Figure 12.A. The original mudstone was slightly dolomitized. Dolomitic rhombs, subequal in size and randomly arranged in the micritic matrix, resulted from replacement. The next step was fracturing that was later partly occluded by baroque dolomite. Two possible events occurred next: either 1) the remaining fracture porosity was cemented by anhydrite first, or 2) the remaining micritic matrix was leached first. Although this last hypothesis cannot be fully excluded (because anhydrite tends to precipitate in the larger pores), the first hypothesis is more sound. Accordingly, it is suggested that following baroque dolomite cementation anhydrite in turn cemented the fracture. Then the micritic matrix was leached generating final high porosity and permeability. Figure caption: Green: micrite (i.e., microcrystalline calcite); white/light grey: dolomite; blue: porosity; black: oil/bitumen.