The time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life.
Of or belonging to earlier of two divisions of the Precambrian era.
Sinònims
Examples for "Archean"
Examples for "Archean"
1The period following on after Archean time is called, by geologists, Paleozoic time.
2Others divide the Precambrian into two eras, the very ancient Archean and the more recent Proterozoic.
3Rocks of Archean age cover wide areas in the interior, in West and East Africa and across the Sahara.
4A theory held by many refers the ultimate source of the iron to the igneous rocks of the Archean.
5Together, the data paint a picture of Archean evolution that is one of early development of morphological and chemical complexity.
1Appears to indicate, as I suspected, that earth has seen whole cycle or cycles of organic life before known one that begins with Archæozoic cells.
Translations for Archaeozoic