Ypresian ICS Stage
From 55.8 +/- 0.2 To 48.6 +/- 0.2 Ma
Start Defined By: Base of negative carbon-isotope excursion.
End Defined By: Planktonic foraminifer, lowest occurrence of Hantkenina.
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: Dababiya Section near Luxor, Egypt
-- Overlaps With --
Australian Stage: Wangerripian (61.7 - 52)
Australian Stage: Johannian (52 - 36)
Californian Stage: Ulatisian (51 - 48)
New Zealand Stage: Waipawan (56.5 - 52)
New Zealand Stage: Heretaungan (50 - 47)
North American Stage: Clarkforkian (56 - 55.5)
North American Stage: Bridgerian (50.5 - 45.4)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Cenozoic (65.5 - -5.5012e-005)
Period: Paleogene (65.5 - 23.03)
Epoch: Eocene (55.8 - 33.9)
Sub-Epoch: Early Eocene (55.8 - 48.6)
Informal Sub-era: Tertiary (65.5 - 1.806)
-- Preceeded By --
Epoch: Paleocene (65.5 - 55.8)
Sub-Epoch: Late Paleocene (58.7 - 55.8)
ICS Stage: Thanetian (58.7 - 55.8)
Californian Stage: Ynezian (61.5 - 55.8)
-- Followed By --
Sub-Epoch: Middle Eocene (48.6 - 37.2)
ICS Stage: Lutetian (48.6 - 40.4)
-- Contains the Following Stages --
Californian Stage: Bulitian (55.8 - 53)
Californian Stage: Penutian (53 - 51)
New Zealand Stage: Mangaorapan (52 - 50)
North American Stage: Wasatchian (55.5 - 50.5)
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