Fig. 9

Field aspects and facies associations of the Ab-Haji Formation. a Dark green to gray shales interbedded with siltstone and fine-grained sandstone of the prodelta facies association grade upsection (towards the left) into brown limestones and marls of the open marine Badamu Formation (Ravar–Abkuh section). b Shallow-marine facies association, characterized by well-bedded, horizontal to very-low-angle cross-stratified sandstone and siltstone (Zarand–Eshkeli section). c Highly bioturbated rippled surface on fine-grained sandstone of the shallow-marine facies association (Zarand–Eshkeli section). d Hummocky cross-stratified sandstone of the shallow-marine facies association (Ravar–Abkuh section)