Hadean Eon
(Priscoan, Azoic)
From 4567.17 +/- 0.7 To 3800 Ma
Start Defined By: Formation of Earth
Start Based On: Amelin, Krot, Hutcheon, and Ulyanov, "Lead Isotopic Ages of
Chondrules and Calcium-Aluminum-Rich Inclusions", _Science_, Sept. 6,
2002.
Comment: Start date reflects earliest CAIs formation, at the birth of the
solar system. The Hadean is not officially recognized ICS nomenclature.
-- Overlaps With --
South African Stage: Swazian (4000 - 3000)
-- A Substage of --
Time: Precambrian (4567.17 - 542)
-- Followed By --
Eon: Archean (3800 - 2500)
Era: Eoarchean (3800 - 3600)
Chinese Stage: Qianxin (3800 - 3400)
European Stage: Isuan (3800 - 3500)
-- Contains the Following Stages --
General Stage: Cryptic (4567.17 - 4150)
General Stage: Basin Groups (4150 - 3975)
General Stage: Nectarian (3975 - 3900)
General Stage: Early Imbrian (3900 - 3800)
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