آرکئن

Also known as Archaean, Archaeozoic, Archeozoic, Archean Eon, Archæan, Archaeozoic Eon, Archeozoic Eon

از ابر دوران های زمین شناسی

AI overview

The Archean is the second major division of Earth's history, spanning from roughly 4.0 to 2.5 billion years ago, and it followed the Hadean Eon and preceded the Proterozoic. This eon is significant because it saw some of Earth's earliest known events, including the possible tail end of heavy asteroid impacts and the oldest recorded glaciation.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Geologic timespan.top_bar: all time
Geologic timespan.color: Archean
Geologic timespan.image_art: File:Archean.png
Geologic timespan.caption_art: Artist's impression of an Archean landscape
Geologic timespan.timeline: Eons
Geologic timespan.name_formality: Formal
Geologic timespan.alternate_spellings: Archaean, Archæan
Geologic timespan.synonym1: Eozoic
Geologic timespan.synonym1_coined: J.W. Dawson, 1865
Geologic timespan.celestial_body: earth
Geologic timespan.usage: Global (ICS)
Geologic timespan.timescales_used: ICS Time Scale
Geologic timespan.chrono_unit: Eon
Geologic timespan.strat_unit: Eonothem
Geologic timespan.timespan_formality: Formal
Geologic timespan.lower_boundary_def: Ten oldest U-Pb zircon ages
Geologic timespan.lower_gssa_location: Along the Acasta River, Northwest Territories, Canada
Geologic timespan.upper_boundary_def: Defined Chronometrically