Precambrian

Precambrian (හෝ Pre-Cambrian, සමහර විටක කෙටිකොට දක්වන පරිදි pꞒ, හෝ Cryptozoic) යනු පෘථිවි ඉතිහාසයේ වසර මිලියන 4600-539 කට පෙර යුගය වේ.

Precambrian

~4600 – 538.8 ± 0.2 Ma

ෆැ.

ප්‍රොටෙරො.

ආකියානු

හේඩි.

Chronology

−4500 —

–

—

–

−4000 —

–

—

–

−3500 —

–

—

–

−3000 —

–

—

–

−2500 —

–

—

–

−2000 —

–

—

–

−1500 —

–

—

–

−1000 —

–

—

–

−500 —

–

—

–

0 —

P
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Hadean

A
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h
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a
n

P
r
o
t
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z
o
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P
h
a
n.

Eo

Paleo

Meso

Neo

Paleo

Meso

Neo

Paleozoic

Mesozoic

Cenozoic

Scale: millions of years

Proposed subdivisions

See Proposed Precambrian timeline

Etymology

Synonym(s)

Cryptozoic

Usage information

Celestial body

Earth

Regional usage

Global (ICS)

Time scale(s) used

ICS Time Scale

Definition

Chronological unit

Supereon

Stratigraphic unit

Supereonthem

Time span formality

Informal

Lower boundary definition

Formation of the Earth

Lower boundary GSSP

N/A

GSSP ratified

N/A

Upper boundary definition

Appearance of the Ichnofossil Treptichnus pedum

Upper boundary GSSP

Fortune Head section, Newfoundland, Canada
47°04′34″N 55°49′52″W / 47.0762°N 55.8310°W

GSSP ratified

1992

ආශ්‍රිත

Phanerozoic – fourth and current eonothem and eon of the geological timescalePages displaying wikidata descriptions as a fallback
- Paleozoic
- Mesozoic
- Cenozoic – third and current era of the Phanerozoic Eon

ආශ්‍රිත

මූලාශ්‍ර