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Full-Text Articles in Earth Sciences
Stratigraphy And Some Structural Features Of The İstanbul Paleozoic, Necdet Özgül
Stratigraphy And Some Structural Features Of The İstanbul Paleozoic, Necdet Özgül
Turkish Journal of Earth Sciences
Palaeozoic rocks crop out across large areas in the İstanbul region. The Palaeozoic sequence starts with the Lower Ordovician fluviatile and lacustrine deposits (Kocatöngel and Kurtköy formations). The area was transgressed by the sea during the Late Ordovician-Early Silurian, represented by the feldspathic quartzwacke and quartz-arenites of the Kınalıada and Aydos formations. The basin became progressively deeper and more stable during the Silurian and Devonian. In this period, micaceous siltstones and sandstones of the Yayalar Formation (Upper Ordovician (?)-Lower Silurian), shelf-type carbonates of the Pelitli Formation (Lower Silurian-Lower Devonian), fossil-rich micaceous shales with rare limestone intercalations representing a low-energy open …
Tectonics Of The Strandja Massif, Nw Turkey: History Of A Long-Lived Arc At The Northern Margin Of Palaeo-Tethys, Boris Natalin, Gürsel Sunal, Muharrem Satir, Erkan Toraman
Tectonics Of The Strandja Massif, Nw Turkey: History Of A Long-Lived Arc At The Northern Margin Of Palaeo-Tethys, Boris Natalin, Gürsel Sunal, Muharrem Satir, Erkan Toraman
Turkish Journal of Earth Sciences
The Strandja Massif, Thrace Peninsula, NW Turkey, forms an important link between the Balkan Zone of Bulgaria, which is usually correlated with Variscan orogen in Central Europe, and the Pontides, where Cimmerian structures are the most prominent. The massif is composed of a Palaeozoic basement and a Triassic metasedimentary cover. The basement is made of various granite gneisses, paragneisses, and schists that are intruded by large plutons of monzonitic metagranites. Detrital zircon studies have revealed Ordovician (433 and 446 Ma) and Carboniferous (305 Ma) ages of the metasedimentary rocks. The isotopic age of the granite gneisses is 308-315 Ma (Carboniferous, …