Karaağaç formation
which is made up of mainly sandstone lithology and presented by the regresive
features toward up in the Gökçeada and Fıçıtepe formation which consist of red
continental conglomerates are Early Eocene in age. Middle Eocene carbonates of
the Soğucak formation including numerous Nummulites overlie Early Eocene units
unconformably. Soğucak formation is presented as lens with no lateral
continuation in the field. Sedimentation continued with the shale deposition of
the Ceylan formation and left its place to the shore face facies of the
Mezardere and Osmancık formations with the beginning of the regression in the
Early Oligocene. Continental Danişmen formation overlies all these units.
Volcanic activity (Hisarlıdağ-Ayvacık volcanics) continued intensly during
Early-Middle Eocene in the region. Depositional systems which were formed under
tectonic control in the Late Miocene continued to be develop until the
beginning of the Early Pliocene. This is turn provided Gazhanedere, Kirazli and
Alçıtepe formations to be deposited. Approximately 1000 m Thick Pliocene
sediments (Ergene formation) were determinal in the offshore sedimentary basins
by the seismic and drilling data, however they do not encountered in the field
exposures. Facies were seperated according to their depositional difference.
There are four main depositional periods in the islands. These are Early
Eocene, Middle Eocene-Late Oligocene, Late Miocene-Pliocene and Pliocene- Present
depositional periods. The most important tectonic feature in the islands is the
Ganos fault which is a western extention of the Late Miocene
NAF. This fault borders the northern part of the Gökçeada island. Lateral
components of the Ganos fault in the southern parts provided sedimentary basins
to be developed in the Late Miocene-Pliocene. There is no tectonic data from the
Early Miocene time in the islands. However, tectonic features can be seen in
the seismic sections from the offshore areas.
Birincil Dil | İngilizce |
---|---|
Konular | Mühendislik |
Bölüm | Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 1 Temmuz 2003 |
Yayımlandığı Sayı | Yıl 2003 Cilt: 126 Sayı: 126 |
Copyright and Licence
The Bulletin of Mineral Research and Exploration keeps the Law on Intellectual and Artistic Works No: 5846. The Bulletin of Mineral Research and Exploration publishes the articles under the terms of “Creatice Common Attribution-NonCommercial-NoDerivs (CC-BY-NC-ND 4.0)” licence which allows to others to download your works and share them with others as long as they credit you, but they can’t change them in any way or use them commercially.
For further details;
https://creativecommons.org/licenses/?lang=en