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What is Geological Eras Overview Chart about?

The document presents a chart of the main geological eras, ranging from the Archaic Era 4.6 billion years ago to the present. The eras are divided into Primary, Secondary, and Tertiary/Cenozoic. Some important milestones include the appearance of unicellular life 3.5 billion years ago, the first fish 500 million years ago, the reign of dinosaurs during the Mesozoic, and the appearance of the human species 2 million years ago.

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ScribdTranslations

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EN