Last Updated：2025/11/20
Sentence
古原生代（約25億年前から16億年前）に堆積した岩石層は、大気中の酸素が劇的に増加したことや初期大陸の成長に関する重要な証拠を保存している。
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Paleoproterozoic rock formations preserve crucial evidence of Earth's oxygenation and early continental growth.
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Paleoproterozoic rock formations preserve crucial evidence of Earth's oxygenation and early continental growth.
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