Early–middle Miocene reefal
limestones are overlain disconformably by late Serravallian– early Tortonian
incised valley-fill deposits of Dağpazarı formation in the Mut Basin. Dağpazarı
formation is composed of mudstone, siltstone, sandstone and conglomerates.
Facies associations of the formation are: fluvial, lagoon, shoal-water delta,
shoreface, beach and barrier island deposits. Loxoconcha tumida Brady and Loxoconcha
sp. in the gray mudstones indicate the freshwater influence and decrease in
salinity. Hemicyprideis sp. documents brackish water conditions. The shoreface
sandstones alternating with the lagoonal mudstones, and oyster-rich beach
deposits in different levels of the sequence indicate episodes of marine
connections. The age of the Dağpazarı formation is provided by the planktonic
foraminifera from the marine mudstones and marls below and above the formation,
and corresponds to the MMi8–MMi10 biostratigraphic interval, which spans the
late Serravallian–early Tortonian. Late Serravallian eustatic sea-level fall
caused to the quick shallowing of the Mut Basin and subaerial exposure of the
reefal limestones at the basin margin. Thus, the incised valley, formed upon
the reefal limestones of the Mut formation. This incised valley reflects a
regional forced regression and unconformity. The Dağpazarı formation was deposited
within this incised valley following an early Tortonian relative sea-level
rise.
Fluvial Lagoon Shoalwater delta Forced regression Planktonic foraminifera
This study was carried out within the project of “The Geology and Palaeogeographic Development of Neogene Rocks in Adana-Mut Basin” between 2009- 2012 by the Department of Geological Researches of the General Directorate of Mineral Research and Exploration (MTA). The SEM photos of Ostracod fossils were taken in laboratories of the Mineral Analysis and Technology Department in MTA. The SEM photos for the planktonic foraminifers were taken in the Microscopy and Microanalysis Laboratory of the Department of Metallurgical and Materials Engineering at the Middle East Technical University (METU). We thank to referees who readand gave support for the development of this article. Massimiliano Ghinassi kindly improved the English version of the manuscript.
Birincil Dil | İngilizce |
---|---|
Konular | Mühendislik |
Bölüm | Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 15 Ağustos 2019 |
Yayımlandığı Sayı | Yıl 2019 |
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