Late Telychian (early Silurian) graptolitic shales and the maximum Silurian highstand in the NW Anatolian Palaeozoic terranes

Date

2010-05-15

Author

Sachanski, Valeri
Göncüoğlu, Mehmet Cemal
Gedik, Ibrahim

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

77
views

0
downloads

The late Llandovery included a period of global sea-level rise with a maximum in the spiralis graptolite Biozone, recorded by black graptolitic shales or red beds. Recent work in the less- known Silurian successions in the Zonguldak Terrane, NW Anatolia, has revealed the presence of Llandovery graptolitic black shales in the lower part of the Findikli Formation in the Camdag, Catak and Karadere areas. In the Camdag area, the "black shale member" yielded numerous well preserved graptolite rhabdosomes, including Oktavites spiralis, Barrandeograptus pulchellus and Retiolites geinitzianus. It is suggested that the graptolitic shales in this area were deposited during the spiralis-lower lapworthi zones. In the Catak and Ovacik areas, black shales intercalated with yellow shales yielded O. spiralis and R. geinitzianus. The deposition of black shales is related to the time of maximum Silurian sea level.

Subject Keywords

Silurian, Sea-level, Graptolites, NW Turkey, Gondwana

URI

https://hdl.handle.net/11511/30973

Journal

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY

DOI

https://doi.org/10.1016/j.palaeo.2010.03.011

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Diel vertical distribution, and herbivory of copepods in the south-western part of the Black Sea Besiktepe, S (2001-04-01) The abundance and population structure of copepods were studied in the southwestern part of the Black Sea in May 1994, April and September 1995, April, June and September 1996. Vertical distribution and diel vertical migration of copepods were studied in April and September 1995 and June 1996. In addition, the grazing rates of three size classes of copepods-300-500, 500-1000 and 1000-2000 mum-were estimated in September 1995. The total abundance of copepods was higher in June samples due to the large contri...
Recent surficial shelf sediments of the Cilician Basin (Turkey), northeastern Mediterranean Ediger, V; Evans, G; Ergin, M (1997-11-01) The continental shelf of Mersin Bay forms the northwestern margin of the Adana-Cilician Basin; it extends from the Goksu delta (in the southwest) to the Seyhan-Tarsus-Ceyhan delta (in the northeast) and is narrower and steeper in the southwest than in the northeast.
Late Permian (Tatarian) fluvio-lacustrine successions in NW Anatolia (Zonguldak Terrane, Turkey): palaeogeographic implications OKUYUCU, CENGİZ; Dimitrova, Tatyana K.; Göncüoğlu, Mehmet Cemal; Gedik, Ibrahim (2017-09-01) Late Permian fluvio-lacustrine successions of the Cakraz Formation in the Zonguldak Terrane between the regions of Akcakoca and Ereli were investigated in order to describe the litho- and biostratigraphic properties and explain the depositional environment. The studied succession with black, dark-grey to greenish-grey shales, siltstones and limestones is named the Alapl Member to distinguish it from the classical red clastic successions, which are tentatively named the Ereli Member of the Cakraz Formation. ...
Jurassic arc volcanism on Crimea (Ukraine): Implications for the paleo-subduction zone configuration of the Black Sea region Meijers, M. J. M.; Vrouwe, B.; van Hinsbergen, D. J. J.; Kuiper, K. F.; Wijbrans, J.; Davies, G. R.; Stephenson, R. A.; Kaymakcı, Nuretdin; Matenco, L.; Saintot, A. (2010-10-01) The early Cretaceous and younger opening of the Black Sea has obliterated much of the older record of Tethyan subduction below southeastern Europe. The earlier Mesozoic evolution was dominated by opening and closure of Tethyan oceans between Gondwana and Laurasia with their consumption, at least in part, accommodated along the southern Eurasian margin. Crimea (Ukraine), a peninsula in the northern Black Sea, represents the northernmost region of southeastern Europe that exposes a record of a pre-Cretaceous ...
Cenomanian - Turonian Oceanic Anoxic Event (OAE2) in the Sakarya Zone, northwestern Turkey: Sedimentological, cyclostratigraphic, and geochemical records Yılmaz, İsmail Ömer; Altıner, Demir; Ocakoglu, Faruk; Acikalin, Sanem (2010-04-01) The Cenomanian/Turonian oceanic anoxic event as recorded in many parts of the world is characterized by presence of black shales and global carbon isotope peaks. Cyclic variations within the anoxic event and association with pelagic red beds are indicated by many studies. Global tectonic/volcanic controls on the origin and the chronostratigraphic position of the anoxic event within the global sea-level changes are important for understanding the paleoceanographic and paleoclimatic conditions during the depo...

Citation Formats

V. Sachanski, M. C. Göncüoğlu, and I. Gedik, “Late Telychian (early Silurian) graptolitic shales and the maximum Silurian highstand in the NW Anatolian Palaeozoic terranes,” PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, pp. 419–428, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30973.