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The Alasehir Graben hosts a thick sedimentary sequence of terrestrial clastics deposited from the Early Miocene to the present. Oil shales occur with thin- to medium-bedded sandstones, siltstones, and shales in the upper part of Alasehir Formation. This study evaluates depositional settings and paleoenvironmental conditions via inorganic geochemistry of oil shales. X-Ray Diffractometer results show the presence of quartz, clay, mica, feldspar, calcite, chlorite, pyrite, and ilmenite. Al2O3 shows strong positive co...