Distinct contrasts between the interior and periphery of Turkey are manifested in its landform regions, climate, soils, and vegetation. The periphery is divided into the Black Sea region, the Aegean region, and the Mediterranean region. The interior is also divided into three regions: the Pontus and Taurus mountain ranges, the Anatolian Plateau, and the eastern highlands. The seventh region of the country is the Arabian Platform in the southeast, adjacent to the Syrian border.

Black Sea Region

The Black Sea region has a steep, rocky coast with rivers that cascade through the gorges of the coastal ranges. A few larger rivers, those cutting back through the Pontus Mountains (Dogukaradeniz Daglari), have tributaries that flow in broad, elevated basins. Access inland from the coast is limited to a few narrow valleys because mountain ridges, with elevations of 1,525 to 1,800 meters in the west and 3,000 to 4,000 meters in the east, form an almost unbroken wall separating the coast from the interior. The higher slopes facing northwest tend to be densely forested. Because of these natural conditions, the Black Sea coast historically has been isolated from Anatolia.

Running from Zonguldak in the west to Rize in the east, the narrow coastal strip widens at several places into fertile, intensely cultivated deltas. The Samsun area, close to the midpoint, is a major tobacco-growing region east of it are numerous citrus groves. East of Samsun, the area around Trabzon is world-renowned for the production of hazelnuts, and farther east the Rize region has numerous tea plantations. All cultivable areas, including mountain slopes wherever they are not too steep, are sown or used as pasture. The mild, damp climate of the Black Sea coast makes commercial farming profitable. The western part of the Black Sea region, especially the Zonguldak area, is a center of coal mining and heavy industry.

Data as of January 1995