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Stratigraphy of the Anthropocene.
Jan Zalasiewicz1, Mark Williams, Richard Fortey
1Department of Geology, University of Leicester, Leicester LE1 7RH, UK. jaz1@le.ac.uk
Summary
The Anthropocene, marked by human impact on Earth systems, is assessed through stratigraphic evidence. This geological epoch shows widespread signals in sediments, chemistry, and biology, with lasting effects.
Area of Science:
- Earth and Environmental Science
- Stratigraphy
- Geology
Background:
- The Anthropocene is an informal term signifying human impact on Earth's systems.
- Assessing the Anthropocene requires evaluating stratigraphic criteria across various scales and processes.
- Understanding the geological evidence for human influence is crucial for defining this epoch.
Observation:
- Lithostratigraphic signals include direct human constructions and indirect sediment flux changes, forming a widespread 'event layer'.
- Chemostratigraphic signals are characterized by new organic compounds, CO(2) release effects like marine acidification, and artificial radionuclides.
- Biostratigraphic signals are rapidly growing, featuring globally transferred species with permanent geological consequences.
Findings:
- Stratigraphic criteria provide a framework for assessing the Anthropocene's geological impact.
- Human activities have created distinct and widespread signals within Earth's stratigraphic record.
- The long-term preservation potential of these signals varies across different stratigraphic domains.
Implications:
- The Anthropocene represents a geologically significant period driven by human activity.
- Stratigraphic analysis offers a robust method for documenting and understanding the Anthropocene's legacy.
- Future geological research will continue to refine the definition and understanding of the Anthropocene based on these signals.
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