Zonguldak basin

The Zonguldak basin of northwestern Turkey is the only basin in Turkey with mineable bituminous coal deposits. It has been mined for coal at least since 1848. The basin takes its name after Zonguldak, Turkey, and lies at approximately 41° N. It is roughly elliptical in shape with its long axis oriented roughly southwest to northeast, and is adjacent to the Black Sea. Three main regions have been recognized in the Zonguldak basin: from west to east, Armutcuk, Zonguldak, and Amasra.