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
Provisional Government of Western Thrace along a ridge of the Rhodope mountains running west of Daridere and east of Madan up to the Bulgarian-Greek border. After the retreat of both the Bulgarian and Greek armies an autonomous state was declared with Ottoman support, in order to avoid Bulgarian rule after the Treaty of Bucharest, in which the Ottomans had not taken part. Under British pressure, the Bulgaria and the Ottomans signed the Treaty of Constantinople, which satisfied the Turkish claims to recognition of Eastern Thrace and recognized Western Thrace as part of Bulgaria. The Ottomans withdrew their forces and by 25 October, and the area