Abstract: Neogene sediments have been known for a long time below the alluvial plain and at the surrounding hills of Graz, but the dating of these deposits is still enigmatic. Up to now all biostratigraphic considerations were based on a few, more or less welldocumented sites. Up to now all biostratigraphic considerations were based on a few, more or less welldocumented sites. The evaluation of already known localities, the results of a new mapping campaign and comparisons with the development in more distal areas of the Styrian Basin provide some novel data. The evaluation of localities already known, the results of a new mapping campaign and comparisons with the development in more distal areas of the Styrian Basin provide some novel data. Based on this, a more detailed stratigraphic scheme is presented. Based on this, a more detailed stratigraphic scheme is presented.