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Proterozoic
(2.5 Bya - 541 Mya, old life, oxygen to Cambrian explosion)
Ciro Santilli
(
@cirosantilli,
40
)
...
Planet in the Solar System
Earth
Earth science
Geologic time scale
Geologic time scale hierarchy
Eon
Updated
2025-07-16
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Eon
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Great Oxidation Event
Phanerozoic
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Proterozoic
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Codex
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2026-10-25
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The geological
eon
between the
Archean
and
Phanerozoic
, from about
2
.
5
billion
to 539 million
years
ago.
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