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Galina-37 [17]
3 years ago
12

How have mass extinctions helped scientists develop the geologic time scale

Biology
1 answer:
sladkih [1.3K]3 years ago
8 0

Scientists developed the time scale by studying rock layers and fossils world wide.
Radioactive dating helped determine the absolute divisions in the time scale. so mass extinction help because there is more to study
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