Type
Zone
Age range
1.88–0 Ma
Holocene
Meghalayan
Northgrippian
Greenlandian
Pleistocene
Late Pleistocene
Chibanian
Calabrian
Gelasian
G. ruber PRZ
G. fistulosus HOZ - Atlantic
1.91.81.71.61.51.41.31.21.11.00.90.80.70.60.50.40.30.20.10.0