Early Pleistocene ICS Stage
(Lower Pleistocene, Calabrian)
From 1.806 +/- 0.005 To 0.781 +/- 0.005 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: Brunhes-Matuyama magnetic reversal.
Start Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
End Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
Global Stratotype Section and Point: Vrica, Calabria, Italy
-- Overlaps With --
Japanese Stage: Kechienjian (1.9 - 1.5)
Japanese Stage: Yuzanjian (1.5 - 0.75)
New Zealand Stage: Nukumaruan (1.96 - 1.1)
New Zealand Stage: Castlecliffian (1.1 - 0.01143)
New Zealand Stage: Okehuan (1.1 - 0.48)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Cenozoic (65.5 - -5.5012e-005)
Period: Neogene (23.03 - -5.5012e-005)
Epoch: Pleistocene (1.806 - 0.01143)
Californian Stage: Wheelerian (1.9 - 0.01143)
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)
-- 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)
-- Followed By --
ICS Stage: Middle Pleistocene (0.781 - 0.126)
European Stage: Sicilian (0.781 - 0.26)
-- Contains the Following Stages --
Australian Stage: Werrikooian (1.806 - 1)
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