Thrace Basin basement, comprises interbedded fine to coarse grained clastics from a variety of depositional environments, turbidite, muddy carbonates with local reef developments, river channels and tuffs. More than 400 wells were drilled till 2008; 14 gas and 3 oil fields were discovered and all of them are producing. Main gas productions zones are between Eocene- Oligocene deposits; Hamitabat (turbiditic sandstones), Ceylan (tuffs), Sogucak (reefal limestone), and Osmancik (deltaic sandstone) formations. Shales of Hamitabat and Mezardere formations have good source potentials. Thrace Basin The European side of Turkey is called the Thrace Basin. It is the largest and thickest Cenozoic sedimentary basin
Turks of Western Thrace 1955 and 1998, approximately 60,000 Greek Muslim individuals, predominantly Turkish, were deprived of their citizenship under Article 19. Of these 60,000, approximately 7,182 lost their citizenship between 1981 and 1997. The application of this law to the Turks of Western Thrace was a retaliatory measure in response to the devastating state-sponsored pogrom which targeted the Greeks of Istanbul in September 1955. The pogrom precipitated an exodus of ethnic Greeks from Turkey. Article 19 was repealed in 1998, though not retroactively. Since the Treaty of Lausanne used the criterion of religion to refer to the ethnic communities, the Greek Government has