Pleistogene Informal Period
From 1.806 +/- 0.005 To -5.5012e-005 +/- 0 Ma
Start Defined By: Just above top of magnetic polarity chronozone C2n
(Olduvai) and the extinction level of calcareous nannofossil Discoaster
brouweri (base Zone CN13). Above are lowest occurrence of calcareous
nannofossil medium Gephyrocapsa spp. and extinction level of planktonic
foraminifer Globigerinoides extremus.
End Defined By: Today (in Myr before 1950)
Start Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
Comment: This is an archaic period name. The ICS standard removes it in
favor of extending the Neogene to the Present Day.
-- Overlaps With --
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)
Period: Neogene (23.03 - -5.5012e-005)
-- Preceeded By --
Epoch: Pliocene (5.332 - 1.806)
Sub-Epoch: Late Pliocene (3.6 - 1.806)
ICS Stage: Gelasian (2.588 - 1.806)
Informal Sub-era: Tertiary (65.5 - 1.806)
North American Stage: Blancan (4.75 - 1.806)
-- Contains the Following Epochs --
Epoch: Pleistocene (1.806 - 0.01143)
Epoch: Holocene (0.01143 - -5.5012e-005)
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