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Paleozoic-Mesozoic Eustatic Changes and Mass Extinctions: New Insights from Event Interpretation
1K.G. Razumovsky Moscow State University of Technologies and Management (the First Cossack University), Zemlyanoy Val Street 73, 109004 Moscow, Russia.
Global sea-level changes influenced fifteen major mass extinctions throughout the Paleozoic-Mesozoic eras. Many extinctions coincided with shifts in sea-level trends, potentially triggering marine biodiversity loss.
Area of Science:
- Paleontology
- Geology
- Climate Science
Background:
- Fifteen major mass extinctions occurred during the Paleozoic-Mesozoic eras.
- Global sea-level fluctuations are a key factor in marine biodiversity studies.
Purpose of the Study:
- To re-evaluate the connection between global sea-level changes and Paleozoic-Mesozoic mass extinctions.
- To analyze the relationship between eustatic (global sea-level) rises/falls and long-term sea-level trends during these extinction events.
Main Methods:
- Analysis of recent eustatic reconstructions.
- Comparison of sea-level event data with mass extinction intervals.
- Examination of eustatic trends during the specified geological periods.
Main Results:
- Many eustatic events during mass extinctions were not statistically anomalous.
- A majority of the studied mass extinctions coincided with interruptions or changes in ongoing eustatic trends.
- These sea-level trend shifts may have facilitated or triggered marine biodiversity loss.
Conclusions:
- Global sea-level changes, particularly trend interruptions, played a significant role in Paleozoic-Mesozoic mass extinctions.
- Further research is needed to fully understand the causal links between eustatic events and biodiversity crises.
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