A) Detailed geological map of the Amalou area. B) Detailed correlation panel (location in A)) of sequence S4.3 (base of Imilchil Formation) on the south flank of Ikkou ridge. C) Field view showing the facies variations in the Amalou area (location in A)) showing oolitic grainstone, close to the ridge, grading to marly dominated mixed deposits in the center of Tilmi mini-basin. See location in Figure 3a.