Precambrian

*Precambrian*
Precambrian
~4600 – 538.8 ± 0.2 Ma ෆැ. ප්‍රොටෙරො. ආකියානු හේඩි.
Chronology
−4500 — – — – −4000 — – — – −3500 — – — – −3000 — – — – −2500 — – — – −2000 — – — – −1500 — – — – −1000 — – — – −500 — – — – 0 —	P ; r ; e ; c ; a ; m ; b ; r ; i ; a ; n Hadean A ; r ; c ; h ; e ; a ; n P ; r ; o ; t ; e ; r ; o ; z ; o ; i ; c 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

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

ආශ්‍රිත

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