The present study describes the sedimentology, coal petrology, and geochemistry of a Miocene coal- and oil shale-bearing succession in the Ilisilik region in central Anatolia, Turkey. Vertical sequence analysis within the 50-150 m thick coarse-grained succession of the Ilisilik oil shale field has allowed 4 sedimentary associations to be distinguished. The facies associations in the Ilisilik oil shale field are dominated by fluvial deposits, which document abrupt facies transitions along the axis of the basin. Fluvial poorly-sorted cobble conglomerates of facies association 1, located along the basin margin grade basinward into well-sorted conglomerates of facies association 2. These deposits grade basinward into the laterally continuous sheets of trough cross-bedded fine-grained sandstone and massive siltstone of facies association 3. Further basinward the fine clastics, oil shale, and coal of facies association 4 are common. Reflectances measured on vitrinite are between 0.54 and 0.67% Rmax. This indicates a coalification equivalent to low volatile subbituminous coal rank of the American Society for Testing and Materials classification for the Ilisilik coals. The maceral composition makes the Illslllk oil shales of the lamosite type.