1. archean - Noun
2. archean - Adjective
3. archean - Adjective Satellite
4. Archean - Proper noun
of or relating to the earliest known rocks formed during the Precambrian Eon
the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Source: WordNetTectonic history (Supercontinents) Evidence of collision and rifting between continents raises questions as to what exactly the movements of the Archean cratons composing Proterozoic continents were. Source: Internet
Earth's deep time in the Proterozoic and deeper still in the Archean is only "recounted by microscopic fossils and subtle chemical signals." Source: Internet