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Fig. 5


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The main macrofacies of the Douleb Member. A: Brown dolomite, oil-impregnated and laminated. B: Clayey limestone. C: Brown limestone, oil-impregnated with whole and rudist shells touching each other (a). D: Brown colored limestone rich in rudists (a) and oysters-debris (b) showing macropores (c). E: Oil-impregnated brown bioclastic limestone, rich in rudist debris (a) and showing an important macroporosity (b). F: Oil-impregnated brown limestone, fine bioclastic limestone showing a fining upward sequence and a macroporosity (a). G: Limestone beige-brown, bioclastic rich in rudists (a) showing a granular-decreasing sequence (yellow arrow). H: Brown anhydrite facies with parallel laminations. I: Gray limestone, very fine bioclastic, showing compaction stylolites (a) very serrated and laminated structures (b).

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