Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective geology Of a
geologic era within theArchaean eon from about 2800 to 2500 million years ago. - proper noun geology The Neoarchean era.
Etymologies
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Examples
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And so it goes, from Mesoproterozoic to Neoarchean to the colossal whack of a Mars-sized object into the Earth that would create the Moon, back in the Hadean era.
Centauri Dreams 2009
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