Sedimentological, cyclostratigraphical and sequence stratigraphical analysis of cretaceous Üzümlü formation (NW Turkey)

Keskinler, Salih Yiğit
High resolution sampling was performed along the Üzümlü Formation exposed near the Yeniceşıhlar village of Mudurnu (Bolu). Field and thin-section analyses showed that the Üzümlü Formation is composed of cm to m scale cycles of 4th and 5th order. The 4th order cycles are equivalencies of parasequences and have 0.4 Ma average duration. 5th order cycles are interpreted as episodic. Upper Albian (OAE1c or OAE1d) and Cenomanian/Turonian (OAE2) anoxic events are observed as black shale levels in the studied section. Position of black shale levels is interpreted using cyclostratigraphy and sequence stratigraphy. Four types of cycle are determined. A and B-type cycles are placed in transgressive and Highstand System Tract. C and D-type cycles are placed in Lowstand System Tract. Two type 3 and one type 1 sequence boundaries are recorded. The boundary between the Soğukçam Limestone and the Üzümlü Formation is interpreted as the first type 3 sequence boundary. The second one separates the Üzümlü Formation and the Yenipazar Formation and is observed at the top of the section. Type 1 boundary is represented by a conglomeratic level in the middle of the succession. Provenance analysis of sandstones indicates that during the Cenomanian the source area changed from magmatic arc setting to continental setting.


Rapid cooling history of a Neotethyan ophiolite: Evidence for contemporaneous subduction initiation and metamorphic sole formation
PARLAK, OSMAN; Dunkl, Istvan; KARAOĞLAN, FATİH; Kusky, Timothy M.; Zhang, Chao; Wang, Lu; Koepke, Juergen; Billor, Zeki; Hames, Willis E.; ŞİMŞEK, EMRAH; Simsek, Gokce; ŞİMŞEK, TUĞÇE; Ozturk, Selena Ezgi (Geological Society of America, 2019-11-01)
The Beywhir-Hoyran Nappes, including Mesozoic carbonate platform rocks, deepsea sediments, and ophiolite-related units, crop out extensively on the western limb of the Isparta Angle in the Central Taurides, Turkey. The ophiolite-related rocks are represented by variably serpentinized harzburgitic mantle tectonites, tectonically underlain by a subophiolitic metamorphic sole and melange. The harzburgitic mantle tectonites and metamorphic sole are intruded by undeformed isolated dikes. Protoliths of the metamo...
Altıner, Sevinç (Wiley, 1993-12-01)
Within the framework of an integrated stratigraphy, a detailed biostratigraphic study of Late Jurassic-Early Cretaceous (Tithonian-Valanginian) calcareous nannofossils was carried out in north-west Anatolia, Turkey.
Geoarchaelogical investigation of central anatolian caravanserais using gis
Ertepınar Kaymakcı, Pnar; Toprak, Vedat; Department of Geological Engineering (2005)
This study comprises analysis of geological, geomorphological constraints that played role in the site selection of caravanserais. In order to do this, 15 caravanserais located along a route from Nevşehir-Aksaray-Konya to Beyşehir were used. The data used in the study include a caravanserai database, lithological maps, and digital elevation model of the area. GIS analyses performed in the study are proximity, visibility, and probability distribution (PDA). The first step is the generation of the ancient tra...
Paleogene evolution and demise of the proto-Paratethys Sea in Central Asia (Tarim and Tajik basins): Role of intensified tectonic activity at ca. 41 Ma
Kaya, Mustafa Yücel; Dupont-Nivet, Guillaume; Proust, Jeannoel; Roperch, Pierrick; Bougeois, Laurie; Meijer, Niels; Frieling, Joost; Fioroni, Chiara; Altıner, Sevinç; Vardar, Ezgi; Barbolini, Natasha; Stoica, Marius; Aminov, Jovid; Mamtimin, Mehmut; Guo Zhaojie, Guo Zhaojie (Wiley, 2019-06-01)
The proto-Paratethys Sea covered a vast area extending from the Mediterranean Tethys to the Tarim Basin in western China during Cretaceous and early Paleogene. Climate modelling and proxy studies suggest that Asian aridification has been governed by westerly moisture modulated by fluctuations of the proto-Paratethys Sea. Transgressive and regressive episodes of the proto-Paratethys Sea have been previously recognized but their timing, extent and depositional environments remain poorly constrained. This hamp...
Monitoring of chemical and isotopic compositions of geothermal waters along the North Anatolian fault zone
Süer, Selin; Güleç, Nilgün Türkan; Department of Geological Engineering (2004)
This study aims to determine the chemical (anion-cation) and isotopic compositions (d18O-dD-3H) of the geothermal waters along the North Anatolian Fault Zone (NAFZ) and highlight any possible seismicity-induced temporal variations during the course of two years (2002-2003) monitoring programme. The geothermal sites are alligned along a 800 km transect of the NAFZ and are, from west to east, Yalova, Efteni, Bolu, Mudurnu, Seben, Kursunlu, Hamamözü, Gözlek and Resadiye. The thermal waters of NAFZ are dominant...
Citation Formats
S. Y. Keskinler, “Sedimentological, cyclostratigraphical and sequence stratigraphical analysis of cretaceous Üzümlü formation (NW Turkey),” M.S. - Master of Science, Middle East Technical University, 2007.