Frasnian-Famennian Magnetic Susceptiblity and carbon isotope data from Poland, Belgium, USA, Canada and China
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2017
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| _version_ | 1867167675678982144 |
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| author | De Vleeschouwer, David Da Silva, Anne-Christine Sinnesael, Matthias Chen, Daizhao Day, James E Whalen, Michael T Guo, Zenghui Claeys, Philippe |
| author_facet | De Vleeschouwer, David Da Silva, Anne-Christine Sinnesael, Matthias Chen, Daizhao Day, James E Whalen, Michael T Guo, Zenghui Claeys, Philippe |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Late Devonian envelops one of Earth's big five mass extinction events at the Frasnian-Famennian boundary (374 Ma). Environmental change across the extinction severely affected Devonian reef-builders, besides many other forms of marine life. Yet, cause-and-effect chains leading to the extinction remain poorly constrained as Late Devonian stratigraphy is poorly resolved, compared to younger cataclysmic intervals. In this study we present a global orbitally calibrated chronology across this momentous interval, applying cyclostratigraphic techniques. Our timescale stipulates that 600 kyr separate the lower and upper Kellwasser positive d13C excursions. The latter excursion is paced by obliquity and is therein similar to Mesozoic intervals of environmental upheaval, like the Cretaceous Ocean-Anoxic-Event-2 (OAE-2). This obliquity signature implies coincidence with a minimum of the 2.4 Myr eccentricity cycle, during which obliquity prevails over precession, and highlights the decisive role of astronomically forced "Milankovitch" climate change in timing and pacing the Late Devonian mass extinction. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_882366 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Frasnian-Famennian Magnetic Susceptiblity and carbon isotope data from Poland, Belgium, USA, Canada and China De Vleeschouwer, David Da Silva, Anne-Christine Sinnesael, Matthias Chen, Daizhao Day, James E Whalen, Michael T Guo, Zenghui Claeys, Philippe Center for Marine Environmental Sciences; MARUM The Late Devonian envelops one of Earth's big five mass extinction events at the Frasnian-Famennian boundary (374 Ma). Environmental change across the extinction severely affected Devonian reef-builders, besides many other forms of marine life. Yet, cause-and-effect chains leading to the extinction remain poorly constrained as Late Devonian stratigraphy is poorly resolved, compared to younger cataclysmic intervals. In this study we present a global orbitally calibrated chronology across this momentous interval, applying cyclostratigraphic techniques. Our timescale stipulates that 600 kyr separate the lower and upper Kellwasser positive d13C excursions. The latter excursion is paced by obliquity and is therein similar to Mesozoic intervals of environmental upheaval, like the Cretaceous Ocean-Anoxic-Event-2 (OAE-2). This obliquity signature implies coincidence with a minimum of the 2.4 Myr eccentricity cycle, during which obliquity prevails over precession, and highlights the decisive role of astronomically forced "Milankovitch" climate change in timing and pacing the Late Devonian mass extinction. |
| title | Frasnian-Famennian Magnetic Susceptiblity and carbon isotope data from Poland, Belgium, USA, Canada and China |
| topic | Center for Marine Environmental Sciences; MARUM |
| url | https://doi.org/10.1594/PANGAEA.882366 |