This report is based on palynological and petrographical studies of a core from a Zuata área well (MARAVEN, S. A.). Palynomorphs encountered have been assigned to 19 genera and 33 species of spores and 9 genera and 26 species of pollen grains. The most probable age is ?Aptian-Early Middle Albian. A comparison with previously published Early Cretaceous microfloral province concepts (BRENNER, 1976; HERNGREEN, 1976, 1981) has been made and implications are discussed. Palynological and sedimentological studies suggest a fluvial environment in arid conditions on a flat topography
