Sedimentological and stratigraphical analysis of the Cenomanian-Santonian rudist-bearing carbonate platform, northern Arabian Plate, the Sabunsuyu section, Kilis area (SE Turkey)

2019-09-10
Mülayim, Oğuz
Yılmaz, İsmail Ömer
Özer, Sacit
Sarı, Bilal
Taslı, Kemal
Hoşgör, İzzet
Our recent studies show that the Cenomanian-Santonian carbonate sediments rich in rudists are widespread throughout southeastern Turkey. The middle-late Cenomanian Derdere Formation and Coniacian-Santonian Karababa Formation, analyzed in the Sabunsuyu section (Kilis province), is almost completely composed of limestones, with subordinate limestones with chert bands, dolomite and dolomitic limestones. On a field scale, we can distinguish rudist-rich beds rhythmically alternating with bioclastic levels composed of bivalve, gastrapod, and roveacrinioid in these formations. Based on facies studied, eleven microfacies were recognized in the studied area, which were categorized in the three facies groups: including inner ramp, mid ramp and outer ramp. Evidences such as the gradual changes in the facies, the absence of extensive uninterrupted barrier reef indicated that the Derdere Formation was deposited in the ramp depositional system, In the lower part of the series carbonate sequences with pelagic fauna sequences (dominantly planktic foraminifera and pithonellids) are documented. The upper part of the series has been analyzed toward the upstream, where rudist-rich facies are well exposed. Wave- and cross-laminations document an overall deposition under influence of occasional high-energy marine environment with some storm-related events. The sedimentology and taphonomic signature of the rudist shell beds have been described in order to get a better understanding of the depositional environment and the physical processes that controlled the Cenomanian-Santonian sedimentation. Monospecific tabular beds mainly characterize the upper part of the series (topmost part of Derdere formation and Karababa Formation); more complex rudist concentrations, characterized by moderate species diversity, increase up-section. The recognized microfacies are organized in shallowing-upward depositional cycles. This change records a general shallowing upward trend as a possible result of an decrease of the accommodation space provided by a relative sea-level low, it is similar with studies around the Arabian Platform. (Steuber, 2002; Özer and Ahmad, 2015, 2016).
Citation Formats
O. Mülayim, İ. Ö. Yılmaz, S. Özer, B. Sarı, K. Taslı, and İ. Hoşgör, “Sedimentological and stratigraphical analysis of the Cenomanian-Santonian rudist-bearing carbonate platform, northern Arabian Plate, the Sabunsuyu section, Kilis area (SE Turkey),” presented at the IAS International Meeting of Sedimentology, (10 - 13 Eylül 2019), Rome, Italy, 2019, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/75324.