The Cretaceous Mardin Group carbonates in southeast Turkey: Lithostratigraphy, foraminiferal biostratigraphy, microfacies and sequence stratigraphic evolution

Ozkan, Recep
Altıner, Demir
The Mardin Group strata, as a product of the Cretaceous carbonate platform developed in the northern margin of the Arabian Platform, consists of a thick sedimentary sequence composed mostly of carbonates with subordinate clastic sediments. In this study, three stratigraphic sections Turkoglu, Derik and Inisdere addressing this sequence have been investigated in terms of lithostratigraphy and biostratigraphy combined with microfacies analysis and sequence stratigraphic interpretation. A comprehensive examination of both benthic and planktonic foraminifers in thin sections has revealed that the age of the Mardin Group ranges from early Aptian to Santonian. The lower Aptian and Cenomanian deposits are characterized by benthic foraminifers, whereas the planktonic foraminifers predominate in the upper Albian, Turonian, Coniacian and Santonian. Following a detailed microfacies analysis, a wide depositional environment ranging from inner to outer ramp have been recognized in the Mardin Group carbonates. A sequence stratigraphic analysis has been carried out in order to trace the signals of global sea-level changes during the deposition of Areban, Sabunsuyu and Derdere formations of the Mardin Group. Twenty one depositional sequences are recognized in the interval from lower Aptian to upper Turonian and, under the control of paleontological data, sequence boundaries are correlated with the cycle boundaries of global charts. Eustatic signals enable to recognize several time lines within the Aptian, Albian, Cenomanian and Turonian stages and some important eustatic events like mid-Aptian sea-level fall and the onset of a more accentuated sea-level rise starting from the early Albian.


The genus Lepidorbitoides evolution and its stratigraphic significance in some Anatolian basins Turkey
ÖZCAN, ERCAN; Altıner, Sevinç (Elsevier BV, 1999-01-01)
Evolution of Lepidorbitoides in some flysch basins of Anatolia has been investigated considering the early ontogenesis in horizontal sections. Different developmental states of L. pembergeri, L. campaniensis, L. bisambergensis, L. minor and L. socialis have been described and illustrated with their morphometric features based on the earliest chamber arrangement. A correlation scheme of phylogenetic developmental states of Lepidorbitoides to the planktonic foraminiferal zones is also proposed. Populations wi...
Reconstruction of a Late Jurassic-Early Cretaceous carbonate platform margin with composite biostratigraphy and microfacies analysis (western Sakarya Zone, Turkey): Paleogeographic and tectonic implications
Atasoy, Serdar Görkem; Altıner, Demir (Elsevier BV, 2018-12-01)
During Late Jurassic-Early Cretaceous the Pontides were the site of a wide carbonate platform facing the Tethys ocean in the south. In the western Pontides the Upper Jurassic-Lower Cretaceous shallow marine carbonates abut the Tethyan Izmir-Ankara suture with no evidence for platform margin deposits. The Sivrihisar klippe 50 km south of the Izmir-Ankara suture preserves a record of the missing platform margin. In the Upper Jurassic-Lower Cretaceous carbonates exposed in this Sivrihisar klippe, two coeval bu...
A Cenomanian-Santonian rudist-bearing carbonate platform on the northern Arabian Plate, Turkey: facies and sequence stratigraphy
Mulayim, Oguz; Yılmaz, İsmail Ömer; Ozer, Sacit; SARI, BİLAL; TASLI, Kemal (Elsevier BV, 2020-06-01)
Recent studies have shown that Cenomanian-Santonian carbonate sedimentary rocks rich in rudists are widespread throughout southeastern Turkey. The Derdere and Karababa formations have been analysed in the Sabunsuyu section (Kilis Province). On a field scale, we can distinguish rudist-rich beds that rhythmically alternate with bioclastic levels composed of bivalves, gastropods and roveacrinids in these formations. Although pelagic faunal elements (predominantly planktic foraminifera and pithonellids) are doc...
End-Permian mass extinction of lagenide foraminifers in the Southern Alps (Northern Italy)
Groves, John R.; Rettori, Roberto; Payne, Jonathan L.; Boyce, Matthew D.; Altıner, Demir (Cambridge University Press (CUP), 2007-05-01)
The Permian-Triassic boundary, examined at two sections in the Southern Alps, occurs similar to 1.0 to 1.5 m above the base of the Tesero Oolite Member of the Werfen Formation in a depositionally continuous sequence of inner neritic carbonates. Lagenide foraminifers from the boundary interval comprise 27 species in 15 genera plus additional unidentified taxa, most of which became extinct during the end-Permian crisis. The only survivors were "Nodosaria" elabugae and unidentified species in Geillitzina and N...
Cyclic palaeokarst surfaces in Aptian peritidal carbonate successions (Taurides, southwest Turkey): internal structure and response to mid-Aptian sea-level fall
Yılmaz, İsmail Ömer; Altıner, Demir (Elsevier BV, 2006-12-01)
The sedimentology and cyclic stratigraphy of palaeokarst structures in Aptian peritidal carbonate successions are interpreted using field and laboratory microfacies analyses of closely spaced samples from measured outcrop stratigraphic sections in southwest Turkey. Cycles displaying shallowing-upward metre-scale cyclicity are generally composed of lime mudstones/wackestones/packestones at the bottom and stromatolites or lime mudstones with charophytes and ostracods at the top. Subaerial exposure structures ...
Citation Formats
R. Ozkan and D. Altıner, “The Cretaceous Mardin Group carbonates in southeast Turkey: Lithostratigraphy, foraminiferal biostratigraphy, microfacies and sequence stratigraphic evolution,” CRETACEOUS RESEARCH, pp. 153–178, 2019, Accessed: 00, 2020. [Online]. Available: