The Early Miocene transgression which inundated the rugged crystalline morphology of the Bohemian Massif led to the formation of the Zogelsdorf Formation, which is characterised by a complex distribution of foraminiferal assemblages. Generally, preservation of the foraminiferal tests is poor; however, it was possible to distinguish six different foraminiferal assemblages using statistical methods (Qmode cluster analysis and information index as a measure of diversity) applied to quantified species or genera counts, in addition to state of preservation. This method of analysis has allowed to differentiate between shallow-water assemblages, in part associated with sea grass meadows ( Ammonia Assemblage and Cibicides-Elphidium Assemblage), in part with sandy bottom and a higher energy conditions ( Elphidium Assemblage), and deeper water assemblages (>30m) ( Hanzawaia Assemblage, Cibicides pseudoungerianus Assemblage and Cassidulina Assemblage).