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File:Geologic Clock with events and periods.svg



The geological clock: a projection of Earth's 4,5 Ga history on a clock ("MA" = a million years (Megayear) ago; "GA" = a billion years (Gigayear) ago)

Date 2010-10-31 06:53 (UTC)
Source File:Geologic_clock.jpg
  • Derivative work: Hardwigg
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