Proterozoic | McGraw Hill's AccessScience

The name Proterozoic combines two words of Greek origin: protero- meaning "former, earlier", and -zoic, meaning "of life".

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The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old.

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The meaning of PROTEROZOIC is of, relating to, or being the eon of geologic time or the corresponding segment of rocks that includes the interval between ...

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During the Proterozoic the atmosphere and oceans changed significantly. Proterozoic rocks contain many definite traces of primitive life-forms—the fossil ...

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Proterozoic definition: the longest geologic eon and the most recent division of Precambrian time, during which the presence of oxygen in Earth's atmosphere ...

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The period of Earth's history that began 2.5 billion years ago and ended 542.0 million years ago is known as the Proterozoic, which is subdivided into three ...

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A major division of geologic time spanning from 2500 to 541 million years ago (MYA). The beginning of Proterozoic time is an arbitrary boundary that roughly ...

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1. the later of two divisions of the Precambrian era, during which the earliest plants and animals are assumed to have lived. Compare Archaeozoic.

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The Proterozoic Eon is the most recent division of the Precambrian. It is also the longest geologic eon, beginning 2.5 billion years ago and ending 541 million ...

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How did the Proterozoic eon get its name? ... The name Proterozoic means 'earlier life". This name indicates that organisms in this eon were simpler and much ...

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