Organic-walled dinoflagellate cysts from Miocene deposits of the Legnica-33/56 borehole (Fore-Sudetic Monocline) as indicators of marine ingression in south-western Poland

Marine dinoflagellate cysts are described from the basal part of the Mu?akow series in the Legnica-33/56 borehole (Fore-Sudetic Monocline, south-western Poland). Their occurrence reflects marine ingression that covered this area during the Middle Miocene. Qualitative composition of dinocyst and sporomorph assemblages allows reconstructing the palaeoenvironment of present-day Legnica vicinity as a shallow marine bay with rich vegetation of the Everglades-type.