Tertiary Informal Sub-era
From 65.5 +/- 0.3 To 1.806 Ma
Start Defined By: Iridium Anomaly. Associated with a major extinction
horizon (foraminifers, calcareous nannofossils, dinosaurs, etc.)
Start Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
Comment: Tertiary is not a formally recognized ICS division. It's end
varies depending on how the Quaternary is defined. See that entry for
explanation.
-- Overlaps With --
Period: Neogene (23.03 - -5.5012e-005)
Californian Stage: Wheelerian (1.9 - 0.01143)
Japanese Stage: Kechienjian (1.9 - 1.5)
New Zealand Stage: Nukumaruan (1.96 - 1.1)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Cenozoic (65.5 - -5.5012e-005)
-- Preceeded By --
Era: Mesozoic (251 - 65.5)
Period: Cretaceous (145.5 - 65.5)
Epoch: Late Cretaceous (99.6 - 65.5)
ICS Stage: Maastrichtian (70.6 - 65.5)
European Epoch: Senonian (89.3 - 65.5)
Japanese Stage: Hetonian (77.1 - 65.5)
Regional Stage: Rognacian (68 - 65.5)
-- Followed By --
Epoch: Pleistocene (1.806 - 0.01143)
ICS Stage: Early Pleistocene (1.806 - 0.781)
Australian Stage: Werrikooian (1.806 - 1)
Informal Period: Pleistogene (1.806 - -5.5012e-005)
Informal Sub-era: Quaternary (1.806 - -5.5012e-005)
North American Stage: Irvingtonian (1.806 - 0.3)
-- Contains the Following Periods --
Period: Paleogene (65.5 - 23.03)
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