Fluvial continental carbonate facies (F8 and F9). (A) Thin section of an oncolitic limestone (F8 facies) displaying various oncoid shapes, spherical (black arrow) and elongate (white arrows) within a interparticle porous zone. The texture of the limestone after the Dunham classification (Dunham, 1962) is floatstone to rudstone. (B) Detail of an oncolitic limestone showing the coatings of a spherical oncoid (Onc). (C) Core photograph showing beige microbial crusts (tufa fragments?) within a microbial limestone (F9 facies). (D) Microphotograph under plane polarized light showing microbial crusts (probably tufa fragments) that are non-organized and some of which look like broken crusts (white arrow). (E) Floatstone of microbial limestone (F9) showing micrite coating on thin grains (encrustations around leaves?). The white arrow indicates incipient pedogenic imprints expressed by the development of cracks filled with calcite.