archean aeon

noun

Meaning

The second geologic aeon in Earth's history, spanning from approximately 4 billion to 2.5 billion years ago, characterized by the cooling of the Earth's crust and the emergence of the first life forms.

Examples

Geologists study rock formations from the Archean aeon to understand how early continents were formed.
The atmosphere during the Archean aeon lacked free oxygen, which allowed only anaerobic life to thrive.

Synonyms: early earth, precambrian, geologic time, eon

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archean aeon

noun

Pronunciation: ɑːrˈkiːən ˈiːɒn

Definition

The second geologic aeon in Earth's history, spanning from approximately 4 billion to 2.5 billion years ago, characterized by the cooling of the Earth's crust and the emergence of the first life forms.

Examples

Geologists study rock formations from the Archean aeon to understand how early continents were formed.
The atmosphere during the Archean aeon lacked free oxygen, which allowed only anaerobic life to thrive.

Synonyms of archean aeon

Words with a similar meaning to archean aeon:

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