Proterozoic eon

The second eon in Earth's history: 2.5 billion to 590 million years ago.

Thesaurus

Noun

Proterozoic eon - from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organismsProterozoic, Proterozoic aeonPrecambrian, Precambrian aeon, Precambrian eon, Precambrian period - the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago

Proterozoic eon

Proterozoic eon:

see PrecambrianPrecambrian,
name of a major division of geologic time (see Geologic Timescale, table), from c.5 billion to 570 million years ago. It is now usually divided into the Archean and Proterozoic eons. Precambrian time includes 80% of the earth's history.
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MedicalSeeProterozoic

Proterozoic eon

Related to Proterozoic eon: Hadean eon, Archean eon, Paleozoic era, Phanerozoic eon

noun

Synonyms for Proterozoic eon

noun from 2,500 to 544 million years ago

Synonyms

Proterozoic
Proterozoic aeon

Related Words

Precambrian
Precambrian aeon
Precambrian eon
Precambrian period

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