English: The Archean (also spelled Archaean, formerly called the Archaeozoic, also spelled Archeozoic) is a geologic eon before the Proterozoic, ending 2500 Ma (million years ago).
This category has the following 6 subcategories, out of 6 total.
Media in category "Archean"
The following 14 files are in this category, out of 14 total.
- Ancient rocks mix.jpg 715 KB