Keywords : Bekhme

Analysis of Slope Failure at the Southwestern Limb of Perat Anticline - NE Iraq Using Stereographic Projection

Iraqi National Journal of Earth Sciences, 2018, Volume 18, Issue 1, Pages 59-76

Rock slopes analysis in south western limb of Perat anticline, near Bekhme village, were studied. Seven stations were chosen to study these slopes which distributed along several exposed formations of Bekhme, Shiranish, Tanjero, Kolosh, Khurmala, and Gercus interbeded with Pila Spi according to their existence on the road, beginning from the Iron Bridge of Bekhme.
Stereographic projection technique was used in analyzing and classifying these slopes. Plane sliding along bedding planes and joints is the predominant in the formations of Bekhme, Shiranish, Pila Spi and some of khurmala Formation. Clastic rock Formations of Tanjero, Kolosh, and Gercus help to failure in steep and moderate slopes. Because of no distinctive favorable discontinuities to slide along, these slopes are suffering from raveling processes which means granular disintegration into small components by different processes. The rock slopes of Khurmala Formation are affected by wedge sliding along discontinuities intersections with bedding planes.

The Significance Diachronous Age as an Indicator of the Southeast Advance of the Zagros Orogenic Belt During Campanian, NE. Iraq

Kamal H. Karim; Omar A. Al-Badrani; Rabeea K. Znad

Iraqi National Journal of Earth Sciences, 2013, Volume 13, Issue 2, Pages 1-14

The contact between Bekhme and Shiranish Formations is studied paleontologically in Bekhme gorge and Rawanduz area. The nannofossils are used to prove that the age of the base of the Shiranish Formation is lower late Campanian and middle Campanian in Bekhme gorge and Rawanduz area respectively. The older age of the Rawanduz area is attributed to early drowning (flexing downward) of the forebulge of the Arabian platform due to southwest propagation of tectonic load of the Zagros Orogen during early stage of collision of Afro-Arabian and Iranian plates by which the Tethys ocean closed later.

Foraminiferal Biostratigraphy of Bekhme Formation (Late Campanian) in Dohuk Area/ Northern Iraq

Layla Y. Al-Haidary; Majid M. Al-Mutwali

Iraqi National Journal of Earth Sciences, 2012, Volume 12, Issue 3, Pages 41-72

The lithology and biostratigraphy of Bekhme Formation and lower part of Shiranish Formation have been investigated within a well – exposed section at the southern limb of Bekhair anticline, Dohuk area, north of Iraq. The section consists of marly limestone, limestone, conglomerate and marl. The lower contact of Bekhme Formation is not exposed in the studied area. The upper contact is unconformably overlain by the Shiranish Formation which consists of marl, limestone and marly limestone.The sequences of the section are characterized by rich foraminiferal faunas, where forty - eight planktonic species belonging to fourteen genera besides fifty - three benthonic species and subspecies belonging to forty genera have been recognized. The study of planktonic foraminifera resulted in the recognition of four biozones, these are from older at base:
4- Gansserina gansseri Interval Zone (part) (CF7).
3- Globotruncana aegyptiaca Interval Zone (CF8).
2- Globotruncanita stuarti – stuartiformis Partial Range Zone (CF9).
1- Globotruncanita calcarata Total Range Zone (part) (CF10).
The larger benthonic foraminiferal fauna, which appears within five stratigraphic intervals permits the recognition of: Orbitoides medius– Lepidorbitoides minor Assemblage Zone. Planktonic and benthonic zones were correlated with other zonal schemes in and outside Iraq. The studied section is appeared within late Campanian age.
Key words: Bekhme Formation, Late Campanian, Planktonic Foraminifera, Zone.