The Department of Geology at the College of Science discussed a PhD thesis titled 'Basin Connectivity and Stratigraphic Succession of the Yamama Formation: A Stratigraphic and Sedimentary Perspective in Selected Sections of Iraq.'  

The researcher, Rana Tahseen Kazem, submitted it to the University of Basrah/College of Science, and the study included:  

Practical part: Petrographic analysis of 544 thin sections from 8 fields, supported by microfacies analysis, biostratigraphy, and sequence stratigraphy.  

Depositional environment: Both formations were deposited on a homogeneous carbonate slope; the Yamama (in the south) represents a stable, restricted shelf without clastics, while Kararko (in the north) is an open slope in a foreland basin with silicate influx. Age and sequence: Yamama (Berriasian-Valanginian) has 2-3 cycles, and Kararko (Hauterivian-Barremian) has a single cycle dominated by HST, with evidence of diachronous migration of one Calpionellid species.  

The results concluded that partial lateral equivalence means a temporal overlap without continuous deposition, separated by an ancient uplift that divided the plate into a stable southern shelf (Yamama) and a northern foreland basin (Kararko), confirming that they are not a single depositional system.  

The study recommends conducting further studies...