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Why do earth scientists need a geologic time scale?.

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The geologic time scale is used by scientists to depict the sequence of events on earth. Scientists devised the geologic time scale after noticing differences in fossils as they progressed from oldest to youngest sedimentary strata.
User Shangxiao
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The geologic time scale is used by scientists to depict the sequence of events on Earth. Scientists devised the geologic time scale after noticing differences in fossils as they progressed from oldest to youngest sedimentary strata.
User Uncovery
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