ABSTRACT: Southern Marmara Region is important in terms of coal in Turkey. Ulubat, Bursa and İnegöl faults divided the region in to two parts. Northern part of the region Upper Miocene-Pliocene aged Mudanya, Yenişehir and İnegöl, southern part of the region Lower Miocene-Pliocene aged Mustafakemalpaşa, Orhaneli and Domaniç basins wereformed. Coalifıcation was completed in the Neogene basins locating in the southern Marmara region in the Early-Late Miocene. in spite of these the same age period coal are formed from each other independently. Neither economic coal occurences nor suitable basin conditions were realized during the Pliocene. From the vitrinite reflection values, the coals seem to be classified as sub bituminous coal (ASTM) and brown coal (DIN) in rank