Archaean

archaean Archæan English Alternative forms en Archean en Archæan archaic Etymology From en grc ἀρχαῖος ancient (likely via en la archaeus) en -an. Pronunciation en /ɑːˈkiːən/ RP en LL-Q1860 (eng)-Vealhurl-Archaean.wav Southern England en /ɑɹˈkiːən/ GA en iən 3 Adjective - en mythology Of or relating to Arche, the Muse of beginnings in Greek mythology. en geology Of, or relating to the geologic eon from about 4,031 to 2,500 million years ago; comprises the Eoarchean, Paleoarchean, Mesoarchean and Neoarchean eras; marked by an atmosphere with little oxygen, the formation of the first continents and oceans and the emergence of simple life. en 25 Mar 2006 NewScientist 12/1 The oldest vestiges of continental crust, which date from the Archaean aeon about 4 billion years ago, are in Acasta in north-west Canada. en astronomy "Archean" only Of or relating to the irregular Jovian moon named for Arche. Translations of eon from 3,800 to 2,500 million years ago Catalan: ca arqueà Chinese: Mandarin: cmn 太古代的 Tàigǔdài de Danish: da arkeisk Finnish: fi arkeeinen French: fr archéen Greek: el αρχαιοζωικός Irish: ga Aircéach Italian: it archeano Kazakh: kk архей Norwegian: Bokmål: nb arkeisk Nynorsk: nn arkeisk Portuguese: pt arqueano Russian: ru архе́йский Spanish: es arcaico Swedish: sv arkeisk Proper noun en Q104168 en geology The eon from 2,500 Ma to 4,000 Ma. Hypernyms eon 2,500–4,000 Ma en Precambrian Hyponyms eon 2,500–4,000 Ma en Eoarchaean, en Paleoarchaean, en Mesoarchaean, en Neoarchaean Coordinate terms eon 2,500–4,000 Ma en Hadean, en Proterozoic - eons in Precambrian Translations Archaean eon Catalan: ca arqueà m Chinese: Mandarin: cmn 太古代 Tàigǔdài Czech: cs prahory f-p, cs archaikum n Dutch: nl archeïcum n, nl archaïcum n Estonian: et arhaikum, et ürgaegkond, et ürgeoon Finnish: fi arkeeinen aioni French: fr Archéen m Greek: el Αρχαιοζωικός m Hungarian: hu archaikum Norwegian: no arkeikum m Polish: pl archaik Portuguese: pt Arqueano m Russian: ru архе́й m Spanish: es Arcaico m Swedish: sv arkeikum c See also Appendix:Geologic timescale Further reading