Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Taxonomy and biostratigraphy of calpionellids and saccocoma across the jurassic-cretaceous boundary beds of the alci block: alacaatli olistostromes, Ankara, Turkey
Download
index.pdf
Date
2019
Author
Akgümüş, Begüm
Metadata
Show full item record
Item Usage Stats
371
views
240
downloads
Cite This
The main aim of this study is to determine the exact position of the Jurassic- Cretaceous (the Tithonian-Berriasian) boundary based on the calpionellid species and their biozones within the pelagic limestone block (Alcı Block). To achieve this aim, the stratigraphic section-BA was measured as 59,30 meters throughout the Alcı Block and totally 72 samples were collected for the preparation of the thin sections. Totally 3 zones and 5 subzones have been designated as Chitinoidella Zone (boneti Subzone), Crassicollaria Zone (remanei and massutiniana subzones), Calpionella Zone (alpina and Remaniella subzones). Moreover, the “explosion” of Calpionella alpina at the base of the Berriasian was used as the criterion for the delineation of the boundary. However, the quantitative analysis (counting method) on calpionellids has been used for the first time in this study in order to obtain more accurate results and the measurements on calpionellids have been illustrated for the morphological comparison. All microfossil assemblages including microgranular and hyaline calpionellids, small benthic foraminifera and Saccocoma Agassiz have been identified by using their morphological/taxonomical features. Saccocoma Agassiz was studied at a species level for the first time in Turkey by this study. As a result, Saccocoma tenella Goldfuss and Saccocoma vernioryi Manni & Nicosia have been identified in detail. The pelagic limestone block of the Alacaatlı Olistostromes was defined as the basinal deposition based on the dominance of pelagic fossil assemblages, infrequent occurrence of the small benthic foraminifera and frequently observed distal calciturbidites throughout the section. Furthermore, the grey to white, thin to medium bedded limestone-marl alternations with calciturbiditic intercalations throughout the section indicates the Yosunlukbayırı Formation as the origin of this pelagic limestone block.
Subject Keywords
Geology, Stratigraphic
,
Geology, Stratigraphic
,
Cretaceous-Jurassic boundary.
URI
http://etd.lib.metu.edu.tr/upload/12623040/index.pdf
https://hdl.handle.net/11511/27976
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Foraminiferal and calpionellid biostratigraphy, microfacies analyses and tectonic implications of the upper jurassic – lower cretaceous carbonate platform to slope successions in sivrihisar region (Eskişehir, NW Turkey)
Atasoy, Serdar Görkem; Altıner, Demir; Department of Geological Engineering (2017)
This study focuses on the biostratigraphy, microfacies analyses and the tectonic interpretation of an Upper Jurassic – Lower Cretaceous carbonate succession widely exposed in a tectonic klippe of the Sakarya Zone (Pontides), north of Sivrihisar region (Eskişehir). For this purpose two stratigraphic sections were measured (925 m thick in total) along the carbonate rocks that crop out north of the Dümrek Village. According to the biozonation and the microfacies types, two coeval but dissimiliar depositional d...
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...
Use of sedimentary structures in the recognition of sequence boundaries in Upper Jurassic-Upper Cretaceous peritidal carbonates of the Western Taurides, Turkey
Yılmaz, İsmail Ömer; Altıner, Demir (Informa UK Limited, 2001-08-01)
Subtidal, intertidal, and supratidal carbonate facies are recognized in the Upper Jurassic (Kimmeridgian)-Upper Cretaceous (Cenomanian) peritidal carbonates of the Fele area (Western Taurides, Turkey). Vertical stacking patterns of these facies are of a cyclical character, shallowing upward is the trend of the cyclicity in these carbonate facies. In-situ karstic breccias, collapse breccias, caliche (laminar calcrete), "Microcodium" accretion, and root casts are structures commonly indicative of third-order ...
Foraminiferal paleontology and sequence stratigraphy in the upper visean - serpukhovian deposits (Aladağ unit, Eastern Taurides, Turkey)
Demirel, Seda; Altıner, Demir; Department of Geological Engineering (2012)
The aim of this study is to investigate the Upper Visean substages, delineate the Visean - Serpukhovian boundary with calcareous foraminifera and interpret the foraminiferal evolution and sequence stratigraphical framework by using sedimentary cyclicity across the boundary section. For this purpose a 59,61 m thick stratigraphic section consisting of mainly limestone and partly sandstone and shale is measured in the Aziziye Gediği and Oruçoğlu Formations in the Pınarbaşı Region of Eastern Taurides. A detaile...
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...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
B. Akgümüş, “Taxonomy and biostratigraphy of calpionellids and saccocoma across the jurassic-cretaceous boundary beds of the alci block: alacaatli olistostromes, Ankara, Turkey,” M.S. - Master of Science, Middle East Technical University, 2019.
