The facies analysis of the cenomanian-turonian succession of Surdash-Shaqlawa Area, NE. Iraq

Abstract EN

Three formations were studied from seven outcrops extend from Surdash to Shaqlawa (Cenomanian – Santonian), they comprise Dokan, Gulneri and Kometan Formations.

Four microfacies and eight submicrfacies are identified depending on this microfacies, we determine the depositional environments.

Dokan Formation is deposited in open-marine deep shelf environment; it could be deposited at deeper shelf to slope and basinal settings.

While Gulneri Formation deposited in open sea shelf, as well as at outer shelf settings, the sediments consist of organic–carbon rich black shale and consider a record of the ocean anoxic event 2, Kometan Formation represent pelagic sediments characterize the deep-marine basins in open marine.