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Öğe Marmara Bölgesinden toplanan pliyosen ve kuvaterner dönemlere ait deniz kabuklarının elektron spin rezonans (ESR) yöntemi kullanılarak tarihlendirilmesi(1999) Çetin, Oktay; Erol, Oğuz; Varinlioğlu, Ahmet; Meriç, EnginÇanakkale yöresi ile İzmit Körfezi Denizel Kuvaterner Depolarından, İzmit Körfezi'nde Hersek Deltası ile Kababurun arasında ve İzmit-Yuvacık'ta yapılan kara ve deniz sondajlarından, Marmara Denizi kuzey kıyılarında Kuşdili Çayırı (Kadıköy-İstanbul) ve Ayamama Havzası (Bakırköy-İstanbul) kara sondajlarından elde edilen aragonit yapıdaki mollusk kavkıları Elektron Spin Rezonans (ESR) yöntemi ile g = 2.0006 ESR sinyali kullanılarak tarihlendirilmiştir. Elde edilen yaş verileri ve fosil toplulukları Akdeniz-Marmara Denizi, Marmara Denizi-Karadeniz bağlantılarının Geç Pliyosen-Pleyistosen-Holosen sürecinde gerçekleştiğini belirgin bir şekilde kanıtlamaktadır. Çanakkale Boğazı içinde Çavda ve Tirreniyen arasında bir regresyon (Roma regresyonu?), onu izleyen kısa bir erozyon döneminden sonra bir Tirreniyen transgresyoııu olduğunun kanıtları elde edilmiştir. Karamürsel Yalova arasında Topçular iskelesi dolayında yamaç eteğindeki bir tatlısu formasyonundan alınan fosilin yaşı ile Bakuniyen öncesi 1.8-2.4 Ma olarak saptanmıştır. Buna göre, bu dönemde Marmara Havzası'nda bir tatlısu evresi olmalıdır. Diğer bulgular ile bu bulgu deneştirildiğinde, değinilen tatlısu evresinden önce, yani Pliyosen'de Marmara'nın Akdeniz'e bağlantısı olduğunu gösteren bulgular vardır. Marmara Denizi batısında bir Pliyosen deniz bağlantısının mecudiyeti de metin içinde tartışılmıştır.Öğe New record of calcarenite in Hatay, Turkey: an evidence of the Late Pleistocene Eastern Mediterranean–Red Sea connection(Springer Science and Business Media Deutschland GmbH, 2021) Erginal, Ahmet Evren; Polymeris, Georgios S.; Erenoğlu, Oya; Giannoulatou, Valeria; Meriç, Engin; Karataş, Atilla; Şahiner, Eren; Selim, H. HalukThis study discusses the composition and age of calcarenite deposits and aeolianite overlying the upper Cretaceous ophiolites in the eastern Mediterranean north of the Asi River Delta. They record the Mediterranean–Red Sea water connection in the Late Pleistocene. Petrographic analysis and microfossil determination showed that these deposits are classified as micritic calcarenite and biocalcarenite, indicating deposition in a high-energy shoal environment and carbonate aeolianite with abundant rhizoliths as residuals of rootlet calcification. The invasive species of Amphistegina lobifera Larsen and Peneroplis pertusus (Forskal) found in the calcarenite and aeolianite make it clear that the Indo-Pacific Ocean waters reached the Levantine Sea basin during the periods MIS 5e and/or MIS 5c by following a palaeo-channel along the Gulf of Suez.Öğe Ponto-caspian and mediterranean faunal and floral records of upper pleistocene-holocene sediments from the Izmit Gulf (Marmara Sea, Turkey)(Romanian Society of Palaeontologists, 2021) Kırcı-Elmas, Elmas; Nazik, Atike; Kapan, Sevinç; Meriç, Engin; Zor, Emine Şeker; Kalkan, Beste; Doǧan, Tamer; Güney, Ayşegülİzmit Gulf is located between Kocaeli and Armutlu peninsulas at east of Marmara Sea and the interaction area of North Anatolian Fault Zone (NAFZ) and Marmara Graben systems. In this study, the faunal and floral contents (ostracod, foraminifer, mollusc and diatom) of the samples belonging to seven drilling cores were studied and obtained the radiocarbon and optically stimulated luminescence (OSL) age data in order to establish on the Black Sea – Marmara Sea - Mediterranean water connections and palaeoenvironmental changes. The sediments in this study are Late Pleistocene-Holocene aged and only cover the Marine Isotope Stages MIS-5 (interglacial), MIS-3 (an interstadial period between MIS-4 and MIS-2 glacial epochs) and MIS-1. The determination of ostracod and mollusc fauna of the Mediterranean and Ponto-Caspian origin provide important clues to water exchange between the Mediterranean and the Black Sea. Although some Mediterranean originated ostracods occur sporadically with low abundance, absence of foraminiferal fauna and existence of Ponto-Caspian ostracods together with fresh water and cosmopolitan diatom flora indicate that the area strongly interacted with the Black Sea waters during MIS-5. The faunal and floral characteristics of the sediments deposited during MIS-3, clearly denote that the Izmit Gulf was connected with the Black Sea and the Mediterranean Sea at the beginning of MIS-3 (ca. 52.0 - 40.0 ky BP) and the shallow shelf areas were frequently affected by both the Black Sea discharge and Mediterranean input. A thick Holocene sedimentary sequence recovered from the southern Hersek Burnu drilling cores reflects the environmental changes after the latest Black-Mediterranean seas connection. The studied ostracod and mollusc assemblages are mainly characterized by the Mediterranean originated species with a few relict Ponto-Caspian fauna. Also, the benthic foraminiferal assemblages are dominated by normal marine and euryhaline species, reflecting the salinity fluctuations in the Holocene interval.Öğe The aspects of the Late Quaternary (Holocene) setting belong to the eastern Gulf of Izmit, Adapazari, the delta of Sakarya and their environments(2004) Kerey, I. Erdal; Meriç, Engin; Nazik, Atike; Tuno?lu, Cemal; Avşar, Niyazi; Kapan-Yeşilyurt, Sevinç; Akgün, FundaThis study is carried out on the settings of Holocene at eastern Gulf of ?Izmit, Adapazari, Sakarya Delta and its vicinity, and based on 86 samples collected from the boreholes. The pollen diagram, based on the data from the boreholes drilled at Adapazari and its vicinity, suggested that high herbaceous pollen percentages of particularly Chenopodiaceae and Compositae, and Pinus and Quercus were present during the Early Holocene (approximately 11.300 BP years). Absent of the foraminifers in deltaik environment indicates that there was no any sea effect on the delta. In addition, the Gulf of Izmit, which was connected to Sakarya River in the Middle Pleistocene, moved to west. Moreover, when the elevations of the boreholes and different numerical ages (11.000-3.780 BP years) assigned at different depths are considered, it can be concluded that the region was under the control of tectonic activities in the forms of subsidence and uplift.Öğe Yenikapı (İstanbul) kazılarının jeoarkeolojisi - dendroknoloji ve palinoloji kullanılarak multidisipliner bir yaklaşım(2012) Perinçek, Doğan; Bozcu, Mustafa; Derman, Ahmet Sami; Meriç, Engin; Kozanlı, Candan; Akgün, Funda[Abstract Not Available]
