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
Eastern Macedonia and Thrace Eastern Macedonia and Thrace Eastern Macedonia and Thrace () is one of the thirteen administrative regions of Greece. It consists of the northeastern parts of the country, comprising the eastern part of the region of Greek Macedonia along with the region of Western Thrace, and the islands of Thasos and Samothrace. The region of Eastern Macedonia and Thrace was established in the 1987 administrative reform as the Eastern Macedonia and Thrace Region (, "Periféria Anatolikís Makedonías kaí Thrákis"). With the 2010 Kallikratis plan, its powers and authority were redefined and extended, with the preexisting region in many respects inheriting status