| Unit |
Age |
Formation |
Lithology |
|
|
|
|
|
Quaternary to Recent |
Alluvium |
Unconsolidated and cemented silts and gravels. |
|
|
Fars Formation |
Continental deposits and evaporites (sub - outcropping). |
|
Maestrichtian to Tertiary (T) |
Simsima Formation |
White mudstones and limestones and sucrosic dolomites. |
|
|
Juweiza Formation |
Lithoclastic carbonates, shales and marls (sub - outcropping). |
|
|
|
|
| Semail Nappe |
Permian to Cretaceous |
Ophiolite Suite |
Basic Extrusives (E), Gabbroid hypabyssal rocks (HG), gabbros (G), peridotite
- gabbro migmatites (PG) and peridotites (P). |
|
|
Oman Exocits (E) |
Recrystallised limestone. |
|
|
|
|
| Hawasina Alloch-thonous |
Permian to Jurassic |
Haliw Formation (Ha) |
Red radiolarian cherts and silicified limestone. |
|
|
Al Aridh Formation (Ar) |
Conglomerates, turbidites,cherts. |
|
|
Halfa Formation (Hf) |
Red and green cherts and silicified shales. |
|
|
Dhera Formation (Dh) |
Cherts, limestons, conglomerates, mudstones. |
|
|
Hamrat Duru Group (HD) |
Oolitic, pelletoidal and lithoclastic turbidites, limestones and cherts. |
|
|
|
|
| Autochthonous Unit (Sumeini Group) |
Permian to Jurassic |
Mayhah Formation (Mh) |
Radiolarian sediments, conglomerates and turbidites. |
|
|
Magam Formation (Mq) |
Dolomite carbonates, calcareous shales, cherts, turbidites. |
|
|
Jebel Wasa Formation (JW) |
Reef talus. |
|
|
Ramaq Formation (Rm) |
Limestone, dolomite, sandstone, marl. |
