Neogene Period
From 23.03 +/- 0.05 To -5.5012e-005 +/- 0 Ma
Start Defined By: Base of magnetic polarity chronozone C6Cn.2n; lowest
occurrence of planktonic foraminifer Paragloborotalia kugleri; near
extinction of calcareous nannofossil Reticulofenestra bisecta (base Zone
NN1).
End Defined By: Today (in Myr before 1950)
Start Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
Comment: Alternative End is the start of the Pleistocene. In such systems
the last portion of the Phanerozoic isoften refered to as the Pleistogene.
-- Overlaps With --
Australian Stage: Longfordian (27.5 - 16.5)
Californian Stage: Zemorrian (33.5 - 22)
Informal Sub-era: Tertiary (65.5 - 1.806)
North American Stage: Arikareean (30.5 - 19)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Cenozoic (65.5 - -5.5012e-005)
-- Preceeded By --
Period: Paleogene (65.5 - 23.03)
Epoch: Oligocene (33.9 - 23.03)
Sub-Epoch: Late Oligocene (28.4 - 23.03)
ICS Stage: Chattian (28.4 - 23.03)
New Zealand Stage: Waitakian (27 - 23.03)
-- Contains the Following Epochs --
Epoch: Miocene (23.03 - 5.332)
Epoch: Pliocene (5.332 - 1.806)
Epoch: Pleistocene (1.806 - 0.01143)
Epoch: Holocene (0.01143 - -5.5012e-005)
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