Present day

Quaternary Glacial (0.126Ma)

Neogene Pliocene (3Ma)

Neogene Miocene (8Ma)

Neogene Miocene (15Ma)

Paleogene Oligocene (25Ma)

Paleogene Eocene (40Ma)

Paleogene Eocene (50Ma)

Paleogene Paleocene (60Ma)

Cretaceous-Tertiary (65Ma)

Late Cretaceous (75Ma)

Late Cretaceous (85Ma)

Late Cretaceous (100Ma)

Early Cretaceous (115Ma)

Early Cretaceous (130Ma)

Early Cretaceous (140Ma)

Late Jurassic (150Ma)

Middle Jurassic (170Ma)

Early Jurassic (180Ma)

from http://cpgeosystems.com/nam.html

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