Haluk Direskeneli According to the MTA 2011 report (by İlker Şengüler) and Eskişehir Anadolu University 2014 Academic Article (by Korhan Usta, Hatice Kutluk), there are two horizontal local lignite coal layers extending underground at depth from 250 to 450 meters in the Eskişehir-Alpu coal basin in the southwest-northeast direction with layer thicknesses range from […]