Large Perturbations of the Carbon Cycle During Recovery from the End-Permian Extinction
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Abstract:
High-resolution carbon isotope measurements of multiple stratigraphic sections in south China demonstrate that the pronounced carbon isotopic excursion at the Permian-Triassic boundary was not an isolated event but the first in a series of large fluctuations that continued throughout the Early Triassic before ending abruptly early in the Middle Triassic. The unusual behavior of the carbon cycle coincides with the delayed recovery from end-Permian extinction recorded by fossils, suggesting a direct relationship between Earth system function and biological rediversification in the aftermath of Earth's most devastating mass extinction.Keywords:
Permian–Triassic extinction event
Extinction (optical mineralogy)
Early Triassic
Carbon fibers
Permian–Triassic extinction event
Conodont
Early Triassic
Extinction (optical mineralogy)
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Permian–Triassic extinction event
Conodont
Early Triassic
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The mass extinction at the end of the Permian was the most profound in the history of life. Fundamental to understanding its cause is determining the tempo and duration of the extinction. Uranium/lead zircon data from Late Permian and Early Triassic rocks from south China place the Permian-Triassic boundary at 251.4 +/- 0.3 million years ago. Biostratigraphic controls from strata intercalated with ash beds below the boundary indicate that the Changhsingian pulse of the end-Permian extinction, corresponding to the disappearance of about 85 percent of marine species, lasted less than 1 million years. At Meishan, a negative excursion in delta13C at the boundary had a duration of 165,000 years or less, suggesting a catastrophic addition of light carbon.
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Permian–Triassic extinction event
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Permian–Triassic extinction event
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High-resolution carbon isotope measurements of multiple stratigraphic sections in south China demonstrate that the pronounced carbon isotopic excursion at the Permian-Triassic boundary was not an isolated event but the first in a series of large fluctuations that continued throughout the Early Triassic before ending abruptly early in the Middle Triassic. The unusual behavior of the carbon cycle coincides with the delayed recovery from end-Permian extinction recorded by fossils, suggesting a direct relationship between Earth system function and biological rediversification in the aftermath of Earth's most devastating mass extinction.
Permian–Triassic extinction event
Extinction (optical mineralogy)
Early Triassic
Carbon fibers
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Early Triassic
Permian–Triassic extinction event
Extinction (optical mineralogy)
Biota
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Early Triassic
Permian–Triassic extinction event
Origination
Extinction (optical mineralogy)
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