Areas of Interest
Seismic-scale Jurassic onlap of Triassic foreslope (figure at centre for scale)
Oxfordian biostromal facies are disconformably overlain by reddish brown Late Tithonian radiolarian cherts across the crest of the Musandam Outer High. This outer high was emergent during deposition of the Kimmeridgian Diyab-Jubaila source rock in the adjacent intrashelf basin and may have contributed to oxygen and salinity stratification in the platform interior.
Seismic-scale dip-section illustrating a reef-rimmed Oxfordian shelf-margin at centre left, overlain by four offlapping Kimmeridgian-Tithonoan shelf-margin grainstone wedges, overlain in the far distance by Early Aptian (Shuaiba) and Cenomanian (Natih) prograding shelf margins. Figures at lower centre for scale.
Lower Turonian (Natih A) clinoformed foreslope rudist debris grainstones toeing down into thin-bedded source-prone intrashelf basin facies of the Upper Cenomanian Natih B.
Ammonite-bearing mid-Cretaceous intrashelf basin facies exposed along the inboard margin of the Musandam Outer High.
Stratal stacking patterns exposed along the inboard margin of the Cenomanian-Early Turonian Natih intrashelf basin. Recessive thin-bedded source-prone facies of the Natih D and B members are here interleaved with aggrading-prograding facies of the Natih C and A.
Inboard-facing fault-scarp slump apron attributed to inversion of the Musandam Outer High at the onset of Diyab/Jubaila source rock deposition in the adjacent intrashelf basin.
1.1km+ succession illustrating large-scale Upper Triassic-Jurassic stratal architecture of the Musandam Outer High. Note that the main periods of source rock deposition in the platform interior correspond to times when the Outer High was either shoal-rimmed or emergent.