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
Eastern Macedonia and Thrace and weight of the five now abolished prefectures, Drama, Evros, Kavala, Rhodope and Xanthi. In this special case, the region of Eastern Macedonia and Thrace also succeeds the intermediate structure of the two super-prefectures of Drama-Kavala-Xanthi and of Rhodope-Evros into which the five prefectures had been grouped since 1994. Capital of the region is Komotini, which by population is the fourth largest city, following Alexandroupoli, Kavala and Xanthi. The region is divided into the Macedonian regional units of Drama, Kavala and Thasos and the Thracian regional units of Xanthi, Rhodope and Evros, which coincide with the territory of the former