Stable isotopes and geochemistry of a Campanian-Maastrichtian pelagic succession, Mudurnu-Goynuk Basin, NW Turkey: Implications for palaeoceanography, palaeoclimate and sea-level fluctuations

Acikalin, Sanem
Yılmaz, İsmail Ömer
Vonhof, Hubert
Hakyemez, Aynur
Smit, Jan
This study focuses on the palaeoclimatic evolution and relative sea-level fluctuations of the northern branch of NeoTethys during the late Campanian-early Danian. The studied succession (ismailler Section) is located in the Mudurnu-Goynuk Basin, NW Turkey and dominated by apparently continuous pelagic muddy deposits. Stable isotopic and elemental compositions of the mudrocks are investigated in order to evaluate the palaeoceanographic conditions as well as broad tectonic reconstruction of the basin. The mudrock geochemistry suggests a tectonic reorganization during late Campanian as reflected by a distinct shift from felsic to mafic sediment provenance. In the ismailler Section, five delta C-13 events are identified; four or which are well correlatable with major events in other records around the world, such as the late Campanian Event (LCE), Campanian-Maastrictian Boundary (CMB) and the late Maastrichtian Event (LME). The relative sea-level variations in the basin typically match both short- and long-term global sea-level fluctuations. The remaining globally uncorrelatable delta C-13 event does coincide with tectonic uplift and the abrupt negative delta C-13 shift, and is inferred to be the result of regional factors. The dominance of worldwide events in the records of the relatively restricted ocean branch reflects the strength of global factors.


Ecological response to collapse of the biological pump following the mass extinction at the Cretaceous-Paleogene boundary
Vellekoop, Johan; Woelders, Lineke; Acikalin, Sanem; Smit, Jan; van de Schootbrugge, Bas; Yılmaz, İsmail Ömer; Brinkhuis, Henk; Speijer, Robert P. (Copernicus GmbH, 2017-02-27)
It is commonly accepted that the mass extinction associated with the Cretaceous-Paleogene (K-Pg) boundary (similar to 66 Ma) is related to the environmental effects of a large extraterrestrial impact. The biological and oceanographic consequences of the mass extinction are, however, still poorly understood. According to the "Living Ocean" model, the biological crisis at the K-Pg boundary resulted in a long-term reduction of export productivity in the early Paleocene. Here, we combine organic-walled dinoflag...
Atakul-Oezdemir, Ayse; Purnell, Mark A.; Riley, Nicholas J. (Wiley, 2012-11-01)
Since the 1960s, huge progress has been made in reconstructing the multielement skeletons of conodont species and developing a biologically defensible taxonomy. Nevertheless, a widespread prejudice remains that certain parts of the conodont skeleton, particularly the P-1 elements, are more informative than others with regard to taxonomy and evolutionary relationships. Here, we test these views. A new partial multielement reconstruction of the skeleton of the biostratigraphically significant conodont origina...
DNA fingerprinting and genetic characterization of Anatolian Triticum spp. using AFLP markers
Yildirim, Figen; Akkaya, Mahinur (Springer Science and Business Media LLC, 2006-08-01)
In this study, genetic analysis of Triticum spp. was carried out using AFLP markers. Six AFLP selective combinations were scored as presence and absence of bands for all the individual samples obtained from a single seed of each accession (70 accessions); T. baeoticum (21), T. monococcum (5), T. urartu (16), T. araraticum (7), T. dicoccoides (16) and T. dicoccon (5), resulting in 506 polymorphic AFLP bands. The phylogenetic tree showed two major clusters; one was composed of T. monococcum (AA) and T. baeoti...
Evolution of Neuronal and Endothelial Transcriptomes in Primates
Giger, Thomas; Khaitovich, Philipp; Somel, Mehmet; Lorenc, Anna; Lizano, Esther; Harris, Laura W.; Ryan, Margaret M.; Lan, Martin; Wayland, Matthew T.; Bahn, Sabine; Paeaebo, Svante (Oxford University Press (OUP), 2010-01-01)
The study of gene expression evolution in vertebrates has hitherto focused on the analysis of transcriptomes in tissues of different species. However, because a tissue is made up of different cell types, and cell types differ with respect to their transcriptomes, the analysis of tissues offers a composite picture of transcriptome evolution. The isolation of individual cells from tissue sections opens up the opportunity to study gene expression evolution at the cell type level. We have stained neurons and en...
Review: Short-term sea-level changes in a greenhouse world - A view from the Cretaceous
Sames, B.; Wagreich, M.; Wendler, J. E.; Haq, B. U.; Conrad, C. P.; Melinte-Dobrinescu, M. C.; Hu, X.; Wendler, I.; Wolfgring, E.; Yılmaz, İsmail Ömer; Zorina, S. O. (Elsevier BV, 2016-01-01)
This review provides a synopsis of ongoing research and our understanding of the fundamentals of sea-level change today and in the geologic record, especially as illustrated by conditions and processes during the Cretaceous greenhouse climate episode. We give an overview of the state of the art of our understanding on eustatic (global) versus relative (regional) sea level, as well as long-term versus short-term fluctuations and their drivers. In the context of the focus of UNESCO-IUGS/IGCP project 609 on Cr...
Citation Formats
S. Acikalin, F. OCAKOĞLU, İ. Ö. Yılmaz, H. Vonhof, A. Hakyemez, and J. Smit, “Stable isotopes and geochemistry of a Campanian-Maastrichtian pelagic succession, Mudurnu-Goynuk Basin, NW Turkey: Implications for palaeoceanography, palaeoclimate and sea-level fluctuations,” PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, pp. 453–466, 2016, Accessed: 00, 2020. [Online]. Available: