Eoarchean
From Free net encyclopedia
Template:Eoarchean Infobox In the geologic timescale, the Eoarchean was an era that lasted from 3800 Ma to 3600 Ma (million years ago). It is the first part of the Archaean Eon. During this era, prokaryotes (simple single-celled life) are thought to have originated. The Hadean eon was prior to the Eoarchean. In chronostratigraphy, its zone rank is an erathem.
The International Commission on Stratigraphy does not recognize the lower boundary of the era nor the preceding Hadean Eon.
The Eoarchean was followed by the Paleoarchean era.
The name comes from two Greek words: eos (dawn) and archios (ancient).
[edit]
External links
Template:Geol-stubde:Eoarchaikum
it:Eoarcheano
pt:Eoarqueano
sh:Eoarhej
fi:Eoarkeeinen maailmankausi