Thrace Basin Thrace Basin The European side of Turkey is called the Thrace Basin. It is the largest and thickest Cenozoic sedimentary basin in Turkey. The basin is triangular shaped, trends WNW-ESE and was formed by extension in late Middle Eocene to latest Oligocene times. This gas prone basin is located northwest of Istanbul, Turkey. About 9,000 meters of Eocene-Miocene marine clastics and continental sediments were deposited. Several basement faults were reactivated and underwent strike-slip motion in late Miocene times where the famous North Anatolian Fault bounds the southern part of the basin. The Cenozoic sedimentary succession, overlying Paleozoic to Mesozoic metamorphic
Western Thrace part of Turkey after the Treaty of Lausanne. Western Thrace was ceded to the Entente in December 1919, after which many Bulgarians left the region, while many Greeks moved in. The Government of the Entente (led by French general Sharpe) held its own census in 1920, according to which Western Thrace had a population of 204,700, of whom: Turks 36.5% (74,720 Muslims), Bulgarians 32.2% (65,927 = 54,079 Christians and 11,848 Muslims), Greeks 27.4% (56,114 Christians), Jews 1.5% (2985) Armenians 0.9% (1880), others 3066. At the time this census was conducted, a part of the Greek population of Ksanthi, who left