Ediacaran Period Paleoproterozoic Era Proterozoic Eon Mesoarchean Era Geologic Time Scale (2019) Siderian Period Prekambr Précambrien Archean Eon Tonian Period 前寒武纪 Calymmian Period a2 younger bound -541.0 +|-1.0 Ma Prækambrium Hadean Eon Precambrian Supereon Informal Base of Phanerozoic Rhyacian Period Phanerozoic Eon Prekambras Orosirian Period Cambrian Period predkambrij Mesoproterozoic Era Formation of the Earth Prekambrium Prekambrium Precámbrico Prekambrium prekambrium prekambrium prekambrium older bound -4567 +|-1 Ma Stenian Period Paleoarchean Era 先カンブリア時代 Terreneuvian Epoch Neoarchean Era Precambrium Statherian Period Prekambri precambriano Paleozoic Era Ectasian Period Cryogenian Period Precâmbrico Neoproterozoic Era Präkambrium Fortunian Age Eoarchean Era Precambrian Прекамбрий