Keywords : middle Miocene

Some records Ostracod species of genus Paijenborchellina from the Middle Miocene Fat'ha Formation, Eastern Butmah Anticline, Northwestern Mosul City, Iraq

Maha Mohammed; Ibrahim Al-Shareefi

Iraqi National Journal of Earth Science, 2021, Volume 21, Issue 1, Pages 1-19
DOI: 10.33899/earth.2021.170377

Through a comprehensive taxonomic study of the ostracoda fossils in Fat'ha Formation in the stratigraphic section exposed within the eastern limb of Butmah anticline northwestern Mosul city, several genera and their belonging species of ostracoda have been identified from this previously unexamined section in terms of fossils. However, the focus in this research is on the genus Paijenborchellina and its species as it indicates an important environmental, age and geographical indications Six species belonging to this genus have been diagnosed as follows:
Paijenborchellina  keeni Gammudi & Keen, Paijenborchellina  libyca Szczechura,
Paijenborchellina cf. kausalis Khalaf, Paijenborchellina (Eupaijenborchella) iraqensisKhalaf, Paijenborchella (Eupaijenborchella) pronaLyubimova and Guha,andPaijenborchella (Eupaijenborchella) royi Khosla.

Microfacies and Depositional Model Jeribe Formation (Early Middle Miocene), Northwestern of Iraq

Nawrast S. Al-Ayobi; Sattar J. Al-Khafaji; Abdul Aziz M. Al-Hamdani

Iraqi National Journal of Earth Science, 2012, Volume 12, Issue 2, Pages 13-28
DOI: 10.33899/earth.2012.36296

It appears that the tectonism throughout early middle Miocene played an important role in the variations and distribution of facies zones within Jeribe basin. Although, the domination of the lagoonal influences within the most studied exposed succession; microfacies analysis revealed the influences of many other shallow environmental zones. Intermittent tectonic uplifts in basement blocks are reflected by successive secondary marine regressions toward the center of the basin in Sheikh-Ibrahim area. However, this regression had led to the termination of the Jeribe successions at studied area. This is represented at study area by a thick development of tidal flat facies overlain by a fresh lake facies at eastern parts; however it is exclusively represented by a thin bed of tidal flat facies at the western parts.