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 usually insisted that the basis of identification of a minority is religious and not ethnic (or national). Thus Greek officials refer to the Muslim minority in Greece as Greek Muslims, who were based mainly in Western Thrace. Muslim communities also lived in Greek Macedonia, Epirus, and Crete (see Cretan Turks) and were the descendants of Ottoman-era Greek converts to Islam who joined the Turkish Millet (Ottoman Empire). However, these particular communities were relocated from Greece to Turkey following the Population exchange signed between the two countries in 1922-23, with only the Greek Muslims of Western Thrace exempted from it. Successive