The record of drowning of the Arabian Carbonate Platform, in the Cenomanian-Turonian Inisdere section, Adiyaman, SE Turkey: a possible cause for the OAE2 in the region

Mülayim, Oğuz
Yılmaz, İsmail Ömer
Sarı, Bilal
Taslı, Kemal
Wagreich, Michael
Drowning unconformities and their related strata are important records of key tectonic and environmental events. In the Adıyaman region of SE Turkey, Cenomanian-Turonian strata record a drowning unconformity in several stratigraphic section. This study records shallow water carbonate strata overlain by pelagic units containing planktonic foraminiferal assemblages in the Inisdere outcrop section and surrounding well sections. We suggest a succession exposed along the Inisdere Valley in the northwestern Adıyaman which represent best observable outcrop for carbonate platform drowning in the region. Detailed facies analyses, biostratigraphic dating, and paleoenvironmental interpretations using benthic, planktonic foraminifera and calcareous nannofossil collected from the Inisdere succession constrain the drowning event in the beginning of early Turonian. A paleoenvironmental model has been formulated to explain the successive paleocommunity changes during the drowning of the Arabian platform. We relate the drowning of some parts of the platform to the occurrence of the Cenomanian-Turonian oceanic anoxic event. The impingement of anoxic waters over the platform could produce the drastic reduction of the carbonate production observed in the stratigraphic section and therefore a reduction in carbonate accumulation rates. Regional/local subsidence and sea level rise within the Late Cenomanian-Early Turonian interval were the cause of the drowning of the platform and this event might have withnessed the oceanic anoxic event 2 in the region.
20th International Sedimentological Congress (ISC) 2018


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Citation Formats
O. Mülayim, İ. Ö. Yılmaz, B. Sarı, K. Taslı, and M. Wagreich, “The record of drowning of the Arabian Carbonate Platform, in the Cenomanian-Turonian Inisdere section, Adiyaman, SE Turkey: a possible cause for the OAE2 in the region,” presented at the 20th International Sedimentological Congress (ISC) 2018, Quebec, Kanada, 2018, Accessed: 00, 2021. [Online]. Available: