Late Cretaceous stratigraphy in the Mudurnu-Goynuk Basin (Turkey) and inferences on sea-level change in the Late Campanian to Early Maastrichtian

Wolfgring, Erik
Wagreich, Michael
Yılmaz, İsmail Ömer
Liu Shasha, Liu Shasha
Boehm, Katharina
Upper Cretaceous strata at Goynuk, northwestern Anatolia, Turkey, provide a geological record of the Campanian-Maastrichtian from the Sakarya Terrane along the active Neotethys margin. Shales and shaly marls with siliciclastic and volcaniclastic intercalations indicate a pelagic palaeoenvironment rich in planktonic and benthonic foraminifera and calcareous nannofossil assemblages. A composite record from the Campanian to the Maastrichtian records nannofossil standard zones UC15c (CC21) to UC20a (CC26) as well as the Globotrunanella havanensis planktonic foraminifera Zone to the Racemiguembelina fructicosa planktonic foraminifera Zone. The complete 'mid'-Campanian to early Maastrichtian composite section can be correlated to other western Tethyan sections. The Campanian-Maastrichtian boundary is positioned between the first occurrence of the planktonic foraminifera Gansserina gansseri and the last occurrence of the nannofossil Uniplanarius trifidus. Clastic input and higher sedimentation rates constrain regional sea-level lowstands around the late Campanian calcarata Zone and the Campanian-Maastrichtian boundary, corresponding to the Campanian-Maastrichtian boundary event.


Geological evolution of the Central Pontides
Okay, Aral; Altıner, Demir; Sunal, Gursel; Aygul, Mesut; Akdogan, Remziye; Altıner, Sevinç; Simmons, Mike (2015-10-07)
Before the Late Cretaceous opening of the Black Sea, the Central Pontides constituted part of the southern margin of Laurasia. Two features that distinguish the Central Pontides from the neighbouring Pontide regions are the presence of an extensive Lower Cretaceous submarine turbidite fan (the Cag.layan Formation) in the north, and a huge area of Jurassic-Cretaceous subduction-accretion complexes in the south. The Central Pontides comprise two terranes, the Istanbul Zone in the west and the Sakarya Zone in...
Dating of the Black Sea Basin: new nannoplankton ages from its inverted margin in the Central Pontides (Turkey)
Hippolyte, J. -C.; Mueller, C.; Kaymakcı, Nuretdin; SANĞU, ERCAN (Geological Society of London, 2010-01-01)
The Eocene uplift and inversion of a part of the Black Sea margin in the Central Pontides, allows us to study the stratigraphic sequence of the Western Black Sea Basin (WBS). The revision of this sequence, with 164 nannoplankton ages, indicates that subsidence and rifting started in the Upper Barremian and accelerated during the Aptian. The rifting of the western Black Sea Basin lasted about 40 Ma (from late Barremian to Coniacian). In the inner, inverted, Black Sea margin, the syn-rift sequence ends up wit...
Late Cretaceous Arc Magmatism in the Southern Central Pontides: Constraints for the closure of the Northern Neotethyan branches
Sayıt, Kaan; Cemal Göncüoğlu, M.; Ellero, Alessandro; Ottria, Giuseppe; Frassi, Chiara; Marroni, Michele; Pandolfi, Luca (2022-01-31)
In the southern Central Pontides in northern Turkey the remnants of two Neotethyan oceanic basins, currently represented by the Intra-Pontide and the Izmir-Ankara-Erzincan sutures, and the interposing continental microplate (i.e., the Sakarya Composite Terrane) are completely dissected by the North Anatolian Shear Zone (NASZ). Within the resulting kilometre-scale, strike-slip fault-bounded blocks, several Late Cretaceous arc-type magmatic units have been detected. In this paper, we present new geochemical d...
Cenomanian-Turonian drowning of the Arabian Carbonate Platform, the Inisdere section, Adiyaman, SE Turkey
Mulayim, O.; Yilmaz, O. I.; Sari, B.; Tasli, K.; Wagreich, M. (Geological Society of London, 2020-01-01)
The Cenomanian-Turonian carbonate ramp in the Adiyaman Region of SE Turkey (Northern Arabian Platform) records an abrupt shift from benthic carbonate deposits to pelagic deposits near the Cenomanian-Turonian boundary event (CTBE) in the Inisdere stratigraphic section and surrounding borehole sections. A positive delta C-13 excursion of up to 2.15% is recorded in carbonate and organic carbon deposited around the CTBE and provides evidence of a direct link between the CTBE and oceanic anoxic events and the de...
Early Cretaceous sedimentation and orogeny on the active margin of Eurasia: Southern Central Pontides, Turkey
Okay, Aral; Sunal, Gursel; Sherlock, Sarah; Altıner, Demir; Tuysuz, Okan; Kylander-Clark, Andrew R. C.; Aygel, Mesut (American Geophysical Union (AGU), 2013-09-01)
The Pontides in northern Turkey constituted part of the southern active margin of Eurasia during the Mesozoic. In the Early Cretaceous, a large submarine turbidite fan covered most of the Central Pontides. New U-Pb detrital zircon data imply that the major source of the turbidites was the East European Craton-Scythian Platform in the north. This implies that there was no thoroughgoing Black Sea basin between the Pontides and the East European Craton during the Early Cretaceous. The Lower Cretaceous turbidit...
Citation Formats
E. Wolfgring, M. Wagreich, İ. Ö. Yılmaz, L. S. Liu Shasha, and K. Boehm, “Late Cretaceous stratigraphy in the Mudurnu-Goynuk Basin (Turkey) and inferences on sea-level change in the Late Campanian to Early Maastrichtian,” CRETACEOUS CLIMATE EVENTS AND SHORT-TERM SEA-LEVEL CHANGES, pp. 129–146, 2020, Accessed: 00, 2020. [Online]. Available: