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bn:00005395n
Noun Named Entity
SYL
No term available
EN
The time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life WordNet 3.0
Relations
Sources
IS A
EN
eon
EN
eonothem
HAS PART
EN
Mesoarchean
EN
Paleoarchean
EN
Neoarchean
EN
Eoarchean
PART OF
EN
Precambrian
DERIVATION
EN
archean
EN
archeozoic
DESCRIBED BY SOURCE
EN
Brockhaus and Efron Encyclopedic Dictionary
EN
Armenian Soviet Encyclopedia
EN
Encyclopædia Britannica 11th edition
FOLLOWED BY
EN
Proterozoic
FOLLOWS
EN
Hadean

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