Variegated and mottled calcareous claystones (F12 facies). (A) Core photograph from the “Série Rouge” formation showing a dominantly red calcareous claystone displaying green mottles (black arrows). (B) Core photograph showing different hues of red and orange colours within a sandy claystones (F12 facies). (C) Core photograph showing different ped structures with a broad palette of colours in the variegated marlstones with light pink (white arrow), dark red (grey arrow) and dark red-purplish (black arrow) clay matrix. (D) Thin section photograph showing green mottles (white arrows) within a dominantly brown sandy claystone (PPL). (E) Thin section photograph showing cross-cut root filled with blocky sparite (white arrow) within a variegated calcareous claystone (PPL).