Figure 14: Tizi N'Test section. A, General view; B, detailed view of the upper prograding part of a fluvial-dominated M-F sequence (lowest sequence on the log); C, sandstone beds alternating with red siltstones (flood layers) in the upper part of the sequence shown in Fig. B; D to F, views of laminated carbonate deposits interpreted as tidal-flat facies, and showing (Fig. E and F) aligned little vugs (birdeyes?).