Paleoarchean
Geologic period
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The Paleoarchean, also spelled Palaeoarchaean, is a geologic era within the Archean Eon. The name derives from Greek "Palaios" ancient. It spans the period of time 3,600 to 3,200 million years ago. The era is defined chronometrically and is not... Wikipedia
Eon: Archean
Occurred: 3,600 million years ago - 3,200 million years ago
Lower boundary definition: Defined Chronometrically
Lower GSSA ratified: 1991
Proposed redefinition(s): 4031–3490 Ma