The lithological study and micropaleontological analyses of 21 samples taken from four geological sections of lower Miocene deposits led to a stratigraphic study for determination of enrichment of planktonic species in these deposits . These species were combined with biozones of lower miocene and their stratigraphic distribution in the studied sections according to planktonic foraminifera of worldwide spreading . This study contributed in understanding of paleogeographic development of Neogene basin within this period of time , which appeared as a marine progress in lower Miocene , which continued up to upper Miocene in the northwestern part of Syria . The sediments of lower Miocene consisted of marl , clay marl deposits with interfacial layers of clay and limestones or marl limestones deposited unconformithy with nummoliticlimestones of Eocene , or cretaceous carbonates rich in betome sometimes .