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 governor and former Prefect of Rhodopi, (PASOK), elected in the 2010 regional election. The region is home to Greece's main Muslim minority, made up mainly of Pomaks and Western Thrace Turks, whose presence dates to the Ottoman period. Unlike the Muslims of Greek Macedonia, Epirus, and elsewhere in northern Greece, they were exempted from the Greek-Turkish population exchange following the 1923 Treaty of Lausanne (1923). According to the 1991 census, the Muslim minority numbered around 98,000 people or 29% of the population of Western Thrace, of which about half were Western Thrace Turks and the rest (35%) Pomaks and Muslim