Türkiye Jeoloji Bülteni

Cyclic Deposition and Lithofacies Changes in the Braided Stream Deposits of Paleocene in Northern Ankara Region

Abstract: Meandering and braided stream deposits of the Paleocene, which are widespreaded towardsthe west, are exposed in northern Ankara region particularly a tthe vicinities of Lezgi, Orhaniye andKınık villages. The braided stream deposits, approximately 250m, which occur at the bottom of Paleocene continental units, are made of many individual channel-fills and gravelly channel bars superimposedeach other. Lithofacies analyses dependyon Miall (1977)`s definitions showed that the braided streamsediments had been accumulated under tectonic control as both transition and allocyclic sequences,From the base to top, the allocyclicity order is; Donjek type sequences -* Platte type sequences —»Donjek type and Scott type sequences. That cyclicity represents that intensive epirogenic/tectonic movements effected in Ankara region during the Plaleocene time.