Palynological and organic geochemical analyses of the Upper Cretaceous Bozeș Formation at Petrești (southwestern Transylvanian Basin) – biostratigraphic and palaeoenvironmental implications

A palynological and organic geochemical study of the Upper Cretaceous deposits cropping out in the southwestern part of the Transylvanian Basin (Petreşti section) has been carried out. The samples were collected from the marine Bozeş as well as from the overlying continental Sebeş formations, with main focus on the Bozeș Formation. The recovered palynomorph assemblages are represented mainly by early angiosperm pollen and by fern spores. Phytoplankton taxa are either absent or were recorded only as rare occurrences in the upper part of the Bozeş Formation.