Silurian Graptolite, Conodont and Cryptospore Biostratigraphy of the Guluc Section in Eregli, Zonguldak Terrane, NW Anatolia, Turkey

Date

2012-01-01

Author

Sachanski, Valeri
Göncüoğlu, Mehmet Cemal
Lakova, Iskra
Boncheva, Iliana
Demiray, Gulnur Saydam

Metadata

Show full item record

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

Item Usage Stats

220
views

0
downloads

The studied Guluc section of the Silurian Findikli Formation is situated on the western bank of Guluc Creek in Eregli, NW Anatolia, Turkey, in the eastern part of the Zonguldak Terrane. The Guluc section consists of 3 sedimentary packages: greenish grey limy siltstones, 5-7 m thick (1), overlain by an irregular alternation of black shales and clayey limestones, about 15 m thick (2), and a 6-7 m thick succession of mainly siltstones and sandy limestones (3). A combined biostratigraphy based upon graptolites, cryptospores and conodonts indicates that Package 1 is of Llandovery (Rhuddanian, Aeronian and/or early Telychian) age, Package 2 and Package 3 are of late Wenlock-early Ludlow (Homerian and Ludfordian) age. Graptolites in packages 2 and 3 indicate the presence of the Cyrtograptus lundgreni, Neodiversograptus nilssoni and Lobograptus scanicus graptolite biozones. The Ozarkodina crassa Biozone occurs in the lower Gorstian (Ludlow). The specific features of the Guluc section (lithological changes, condensation, stratigraphic gap, change in graptolite diversity) are related to the global model of Silurian T-R cycles. The Silurian Findikli Formation in the Guluc section, about 20 m thick, represents a condensed lithological succession which differs significantly from the coeval thick, stratigraphically widespread black shales and siltstones of the same formation in the Zonguldak and Istanbul terranes. Sixteen cryptospore species are described and their stratigraphic and geographic distributions are summarised.

Subject Keywords

Ereğli, Zonguldak Terrane, Graptolites, Conodonts, Cryptospores, Biostratigraphy

URI

https://hdl.handle.net/11511/32569

Journal

TURKISH JOURNAL OF EARTH SCIENCES

DOI

https://doi.org/10.3906/yer-1004-4

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Ordovician graptolites from the basal part of the Palaeozoic transgressive sequence in the Karadere area, Zonguldak Terrane, NW Turkey Göncüoğlu, Mehmet Cemal; Gutierrez-Marco, Juan Carlos; OKUYUCU, CENGİZ (2014-12-20) The Karadere area to the east of Safranbolu in NW Anatolia is one of the very few localities in Turkey where the contact between the Cadomian basement and the Lower Palaeozoic transgressive succession is well exposed. The Ordovician graptolite Rhabdinopora flabelliformis (Eichwald) ssp. was found in the basal part of the Bakacak Formation, indicating an Early to early Late Tremadocian age for the beginning of the Palaeozoic transgression in the Zonguldak terrane. A few metres above this occurrence, another ...
Refinements in biostratigraphy of the foraminiferal zone MFZ11 (late early Visean, Mississippian) in the Cebecikoy Limestone (Istanbul Terrane, NW Turkey) and palaeogeographic implications OKUYUCU, CENGİZ; Vachard, Daniel; Göncüoğlu, Mehmet Cemal (2013-01-01) The Cebecikoy Limestone from the Variscan flysch of the Istanbul Terrane is assigned to the foraminiferal MFZ11 zone (late early Visean, formerly V2a). This zone is essentially the range zone of Uralodiscus rotundus. Additional bioevents are proposed for characterizing the upper part of this biozone (MFZ11B subzone): the LAD of Eoendothyranopsis and the FAD of Pararchaediscus and Conilidiscus. The majority of foraminifers and algae, belonging locally to MFZ11 are well-known, except for the following taxa: I...
Maastrichtian-Thanetian planktonic foraminiferal biostratigraphy and remarks on the K-Pg boundary in the southern Kocaeli Peninsula (NW Turkey) Sarigul, Volkan; Hakyemez, Aynur; Tuysuz, Okan; Can Genc, Sengul; Yılmaz, İsmail Ömer; Özcan, Ercan (2017-01-01) The Kocaeli Peninsula (NW Turkey) provides one of the best exposed deep marine Upper Cretaceous-Palaeocene sections in north-western Anatolia. The biostratigraphic framework from three sections, namely Belen, Bulduk, and Toylar, in the southern part of the Kocaeli Peninsula is established by means of planktonic foraminifera. A very rich planktonic foraminiferal assemblage analysed both in thin sections and washed residues records a biozonation ranging from the Contusotruncana contusa (CF6) Zone (Maastrichti...
Dinoflagellate cyst biostratigraphy of Miocene strata in the Adana Basin, Eastern Mediterranean, Turkey Turkecan, Aksel Tugba; Munsterman, Dirk; Isik, Ugras; Altıner, Demir; Pinar, Mehtap; Cevik, Tugba; Alay, Zeynep (Informa UK Limited, 2018-01-01) The Adana Basin is one of the major Neogene basins situated in SW Turkey with sedimentary successions providing good records of the paleoenvironmental changes that affected the Mediterranean area. Since a detailed biochronostratigraphic framework has not been properly established in the Adana Basin yet, this study will be the first multidisciplinary approach carried out in this region. In addition, a detailed biozonation based on marine palynomorphs was the first ever documented from the Kopekli Formation d...
Oceanization of the northern Neotethys: Geochemical evidence from ophiolitic melange basalts within the Izmir-Ankara suture belt, NW Turkey Göncüoğlu, Mehmet Cemal; Sayıt, Kaan (2010-04-01) The remnants of the Neotethyan Izmir-Ankara Ocean, the main branch of Neotethys in the eastern Mediterranean are represented by the Dagkuplu Melange Complex in Central Sakarya, NW Turkey. It comprises several blocks or tectonic slices of pillow lavas, some of which include mudstones and radiolarian cherts as intra-pillow-fillings or interlayers. In the Igdecik area, a huge basaltic block has been studied in detail Geochemical data reveal three distinct basalt types separated by sheared contacts The first of...

Citation Formats

V. Sachanski, M. C. Göncüoğlu, I. Lakova, I. Boncheva, and G. S. Demiray, “Silurian Graptolite, Conodont and Cryptospore Biostratigraphy of the Guluc Section in Eregli, Zonguldak Terrane, NW Anatolia, Turkey,” TURKISH JOURNAL OF EARTH SCIENCES, pp. 867–903, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32569.