Era Eoarchean Era

Time runs left (older) → right (younger) · Hover a card for details

Earliest Archean; oldest rocks; intense bombardment (4031-3600 Ma).

4.03 Ga – 3.60 Ga · 431.00 Ma duration

Axis labels in Ma (millions of years ago) · Click a card for details

Eoarchean Era 2

4031 Ma – 4000 Ma Acasta Gneiss Oldest confirmed rocks on Earth The Acasta Gneiss of northwestern Canada (~4.0 Ga) are the oldest known intact crustal rocks.
3800 Ma – 3700 Ma First Life Earliest evidence of life Chemical signatures suggest life existed by at least 3.7 Ga, likely chemosynthetic bacteria near hydrothermal vents.

100%

Density