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Three Eras Research Paper

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The general accepted divisions of our earths are the eon, era, period, epoch, and age, the two highest levels are the Phanerozoic and Precambrian. The Phanerozoic are made of three types of era, they are, Cenozoic, Mesozoic, and Paleozoic. The Precambrian is only made up of three era, they are, Hadean, Archean, and Proterozoic. The first one that came first to start the earth was the Precambrian. The Hadean Eon was names from the mythological Hades. This part of the Geologic time was when there was no earth and when/how it started. In order for a planet to form it takes over 1 million years, so gravity pushed the dust into tiny rocks. The earth had finally formed by the dust and gas that collided together about 4.5 billion years ago. The

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