Fig. 3

Photomicrographs for the nannofossil most representative taxa: 1- Prediscosphaera cretacea, sample 20Â m, Zone UC20, 2:3- Calculites obscurus, sample 120Â m, Zone UC18, 4- Uniplanarius gothicus, sample 125Â m, Zone UC18, 5:6- Arkhangelskiella cymbiformis, sample 70Â m, Subzone UC20b, 7- Micula staurophora, sample 40Â m, Subzone UC20b, 8- Ceratolithoides kamptneri, sample 13Â m, Subzone UC20c, 9- Micula prinsii, sample 25Â m, Subzone UC20d, 10:11- Micula swastika, sample 63Â m, Subzone UC20c, 12- Zeugrhabdotus embergeri, sample 70Â m, Subzone UC20b, 13:14- Placozygus spiralis, sample 117Â m, Zone UC18, 15- Cribrosphaerella ehrenbergii, sample 63Â m, Subzone UC20c, 16- Cribrocorona gallica, sample 90Â m, Subzone UC20a, 17- Biscutum constans, sample 127Â m, Zone UC18, 18- Elipsolithus macellus, sample 7Â m, Zone NP4, 19- Coccolithus pelagicus, sample 5Â m, Zone NP4, 20- Ericsonia subpertusus, sample 7Â m, Zone NP4.