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The geologic timescale has units based on changes in rocks and fossils. true or false
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36 votes
36 votes
The geologic timescale has units based on changes in rocks and fossils.
true or false

User Headshota
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1 Answer

21 votes
21 votes

True

Scientists devised the geologic time scale after observing changes in fossils as they progressed from oldest to youngest sedimentary strata. Eons, eras, periods, and epochs make up the geologic time scale.

User Tom Sebastian
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