In a new study published in the journal Geoscience Frontiers, a team of U.S. researchers analyzed the ages of 89 well-dated geological events of the last 260 million years — such as marine and non-marine extinctions, major ocean-anoxic events, sea-level fluctuations — from the recent geologic literature. A study by Rampino et al. suggests that global geologic events are generally correlated, and seem to come in pulses with an underlying...
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