Figure 12: Pinda Group. A) Fracture cemented by baroque dolomite and anhydrite in a porous doloscrystalstone. The "intercrystalline" porosity results from the leaching of formerly undolomitized parts. It is the latest event in the sequence dolomitic replacement, fracturing, cementation with baroque dolomite, anhydritic cementation, and leaching. B-C) Cementation of a large cavity with baroque dolomite first and anhydrite second. D) Thick stylolitic contact with a porous dolograinstone. The "intercrystalline" porosity results from the leaching of formerly undolomitized parts. It postdates the stylolite. E) Thin stylolitic contact between two porous dolograinstones. Some dolomite rhombs (red arrows) are found at the contact and may well predate the stylolite. F) Thicker stylolitic contact between a porous dolowackestone and a tight doloscrystalstone, cemented by anhydrite. Porosity in the dolowackestone results from a leaching phase postdating the stylolite. G) Slightly dolomitized wackestone with planktonic foraminifers. Red arrows point to dolomite rhombs at the contact of dissolution seams, predating them. A-B, D-F) TL transmitted light; C) PL polarized light (analyzed). For confidentiality purposes the sample depths and the name of wells are not provided.