Type
Zone
Age range
0.18–0 Ma
Holocene
Meghalayan
Northgrippian
Greenlandian
Pleistocene
Late Pleistocene
Chibanian
Buccinosphaera invaginata
Collosphaera tuberosa
0.180.170.160.150.140.130.120.110.100.090.080.070.060.050.040.030.020.010.00