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The term "2.8 Ga" refers to a geological time scale measurement, specifically 2.8 billion years ago (Ga stands for gigaannum, which is a unit of time equal to one billion years). This designation is often used in geology and Paleontology to indicate the age of rocks, minerals, or geological events. For example, if a rock formation is dated at 2.8 Ga, it means it formed approximately 2.8 billion years in the past.

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5d ago

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