Palaeoecology and taphonomy of a middle Miocene domical cheilostome bryozoan, Siwa Oasis, the northern Western Desert of Egypt

Lethaia ◽  
2021 ◽  
Author(s):  
Magdy El Hedeny ◽  
Andrej Ernest ◽  
Ahmed El‐Sabbagh ◽  
Mohammed Rashwan ◽  
Saleh Al Farraj ◽  
...  
Keyword(s):  
Middle Miocene ◽  
Western Desert

scholarly journals Structural setting and tectonic evolution of the Bahariya Depression, Western Desert, Egypt

GeoArabia ◽  
2003 ◽  
Vol 8 (1) ◽  
pp. 91-124 ◽  
Author(s):  
Adel R Moustafa ◽  
Ati Saoudi ◽  
Alaa Moubasher ◽  
Ibrahim M Ibrahim ◽  
Hesham Molokhia ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Tectonic Evolution ◽  
Middle Miocene ◽  
Middle Eocene ◽  
Western Desert ◽  
Normal Faults ◽  
Surface Mapping ◽  
Early Mesozoic ◽  
Hydrocarbon Fields ◽  
Stable Area

ABSTRACT An integrated surface mapping and subsurface study of the Bahariya Depression aided the regional subsurface interpretation. It indicated that four major ENE-oriented structural belts overlie deep-seated faults in this part of the ‘tectonically stable’ area of Egypt. The rocks of the Bahariya area were deformed in the Late Cretaceous, post-Middle Eocene, and Middle Miocene-and subsurface data indicated an early Mesozoic phase of normal faulting. The Late Cretaceous and post-Middle Eocene deformations reactivated the early normal faults by oblique slip and formed a large swell in the Bahariya region. The crest was continuously eroded whereas its peripheries were onlapped by Maastrichtian and Tertiary sediments. The tectonic evolution of the Bahariya region shows great similarity to the deformation of the ‘tectonically unstable’ area of the northern Western Desert where several hydrocarbon fields have been discovered. This similarity may indicate that the same phases of deformation could extend to other basins lying in the ‘tectonically stable’ area, such as the Asyut, Dakhla, Nuqura, and El Misaha basins.

scholarly journals Description of The Karst Phenomena Spreading Along Stratified Sequence in The Western Desert of Iraq

2021 ◽  
Vol 54 (1B) ◽  
pp. 94-101
Author(s):  
Salam Al-Hetty
Keyword(s):  
Middle Miocene ◽  
Western Desert ◽  
Maximum Diameter ◽  
The West ◽  
Stratigraphic Sequence ◽  
Lower Miocene ◽  
The North ◽  
Southern Side ◽  
Western Desert Of Iraq ◽  
The Aesthetic

The study focused on two important sites containing many caves sites located in the west of Al Anbar Governorate. The first site is Um El-Githoaa cavity in Hit region, a cave or trunks was chosen to show the aesthetic of this cave in terms of its shape and dimensions. The maximum diameter is 22.1m, while the perpendicular diameter is 18.5m. It is a dome shape and the height of its roof reaches about 2m located in the stratigraphic sequence falls within the massive gypsum, Fatha Formation (Middle Miocene). Geoelectrical exploration was chosen on the southern side of the cave to check whether the sinkholes scattered in the area are connected to subsurface caves or not. Using a Dipole-dipole array was chosen along a traverse, shown there are three sub-surface caves. This indicates that these phenomena are widespread in the region. The second location is Haditha, Barwana Village which was chosen to study where the cave is located in unconformity breccia zone between Anah Formation (Upper Oligocene- Lower Miocene) and Euphrates Formation (Lower Miocene- Middle Miocene). Barwana cave extends to the north 30 m and then tends to the west extend about 1 km within fragile breccia layer with incoherent components and ends with a small opening at the Euphrates River. This phenomenon was not present in the hard gypsum rocks in the Hit region, it was observed to have a large oval shape

Geochemistry and diagenesis of Middle Miocene carbonate rocks, northern Western Desert, Egypt

1997 ◽  
Vol 1997 (4) ◽  
pp. 191-212 ◽  
Author(s):  
Hanafy Holail ◽  
Mohamed Tamish ◽  
Mohamed El-Askary ◽  
Ahmed Sadek
Keyword(s):  
Carbonate Rocks ◽  
Middle Miocene ◽  
Western Desert
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