Show/Hide Menu
Hide/Show Apps
anonymousUser
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Frequently Asked Questions
Frequently Asked Questions
Browse
Browse
By Issue Date
By Issue Date
Authors
Authors
Titles
Titles
Subjects
Subjects
Communities & Collections
Communities & Collections
Foraminiferal paleontology and sequence stratigraphy in the upper visean - serpukhovian deposits (Aladağ unit, Eastern Taurides, Turkey)
Download
index.pdf
Date
2012
Author
Demirel, Seda
Metadata
Show full item record
Item Usage Stats
4
views
8
downloads
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 detailed micropaleontological study has revealed presence of important foraminiferal groups namely, parathuramminids, earlandiids, endothyroids, archaediscids, biseriamminids, fusulinids, loeblichids, tournayellids and paleotextularids and 145 species and three biozones. The biozones are, in ascending order, Eostaffella ikensis – Vissarionovella tujmasensis Zone (Mikhailovsky; Late Visean), Endothyranopsis cf. sphaerica – Biseriella parva Zone (Venevsky; Late Visean) and Eostaffella pseudostruvei – Archaediscids @ tenuis stage Zone (Taurssk; Early Serpukhovian). A detailed microfacies analysis was carried out in order to understand the depositional history and sedimentary cyclicity and construct the sequence stratigraphic framework of the studied area. Three main depositional environments consisting of open marine, shoal or bank and tidal flat environments were interpreted based on the analysis of 12 major microfacies and 11 sub-microfacies types. Based on the vertical association of microfacies twenty-six cycles, two sequence boundaries and three sequences were recognized in the studied section and these two sequence boundaries, which correspond to the Mikhailovsky and Venevsky horizons, are the records of the global sea level changes during the Late Paleozoic Ice Age. Within this context Visean – Serpukhovian boundary falls in the transgressive system tract of the third sequence. The duration of cycles are calculated as 117 ky and interpreted as orbitally induced glacioeustatic cycles.
Subject Keywords
Foraminifera.
,
Facies (Geology).
,
Geology, Stratigraphic.
URI
http://etd.lib.metu.edu.tr/upload/12614831/index.pdf
https://hdl.handle.net/11511/21805
Collections
Graduate School of Natural and Applied Sciences, Thesis