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
East Thrace be Mediterranean in character. It can descend to about 12°C and can rise to about 32°C, similar to Asian Turkey. East Thrace has an area of 23,764 km (3 percent of the country), slightly smaller than Sardinia, and a population of about 11 million people or about 14 percent of the total population (in 2015); the population density is around 430 people/km, compared to about 80 people/km for Asiatic Turkey, which is also called Anatolia or Asia Minor. However, densities are skewed by the metropolis of Istanbul. The two continents are separated by the Dardanelles, the Bosphorus (collectively known as