Supereon is the longest classification of time in geology. The Precambrian period is a supereon comprised of the Hadean, Archean, and Proterazoic eons.
They Are Known As Eons
Biggest -> Eons
Eons Are Broken Down Into -> Eras
Eras Are Broken Down Even More Into -> Periods
Smallest -> Epochs
An "eon" is the longest division of geological time, consisting of half a billion years or more.
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An eon.
Eon.
era
Precambrian is the largest division of the geologic time scale.
Eon.
Epoch
Eon
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The geologic time scale that represents the longest time span is the eon. It is a unit of time that is equal to a billion years.
Precambrian is the largest division of the geologic time scale.
Eon.
Epoch
epoch
precambrian times
The longest in geological time is an Eon eg. Archeozoic Eon . Edit: there is also the supereon, which is usually composed of 2-3 eons.
Eon
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The oldest division of geologic time is the Precambrian, specifically the Archaean Eon from which the oldest rocks and fossils date. (The Hadean Eon preceded the Archaean, but no geologic records date from this time because the Earth was cooling from a molten state.)
Just see which one is bigger you dumb fuc_k bitc_h