古太古代,或早太古代是太古宙第二個代,年代為3600至3200Ma——古太古代被精密定時,不與地球上任何岩層有關。最早的確切有生微生物席化石有3480Ma老,在西澳大利亞州Dresser組發現。[1][2]瓦巴拉大陸是地球最早的超大陸之一,可能在這一時期形成。[3]:1–13
參考
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