Öz The terrestrial Paleocene sequences at the north of Ankara are chiefly composed of alluvial fan deposits, braided and meandering river sediments and lacustrine carbonate mudstones. In a limited area, only around Orhaniye village, fine-grained volcanoclastics and lavaş are observed. Ali these deposits are in a vertical örder both grain size and depositional environment and they pass into marine Eocene units.