Type
Zone
Age range
13.8–9.3 Ma
Miocene
Tortonian
Serravallian
Langhian
Thalassionema schraderi - Denticulopsis katayamae
Denticulopsis dimorpha - Crucidenticula nicobarica
Denticulopsis hyalina - Denticulopsis lauta
14.013.813.613.413.213.012.812.612.412.212.011.811.611.411.211.010.810.610.410.210.09.89.69.49.2