A 32-million year cycle detected in sea-level fluctuations over the last 545 Myr
Spectral analyses of past relative sea-level oscillations as represented by the ages of 57 Phanerozoic (the last 545 Myr) stratigraphic sequence boundaries from the Canadian Arctic show a strong spectral peak at 32 Myr (>99.9% confidence). These findings concur with previous reports of significan...
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ftdoajarticles:oai:doaj.org/article:30b488f170a6475ea863166acdcb9eda 2023-10-01T03:54:03+02:00 A 32-million year cycle detected in sea-level fluctuations over the last 545 Myr Michael R. Rampino Ken Caldeira 2020-11-01T00:00:00Z https://doi.org/10.1016/j.gsf.2020.06.005 https://doaj.org/article/30b488f170a6475ea863166acdcb9eda EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S1674987120301444 https://doaj.org/toc/1674-9871 1674-9871 doi:10.1016/j.gsf.2020.06.005 https://doaj.org/article/30b488f170a6475ea863166acdcb9eda Geoscience Frontiers, Vol 11, Iss 6, Pp 2061-2065 (2020) Sea level Periodicity Sequence boundary Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.1016/j.gsf.2020.06.005 2023-09-03T00:34:47Z Spectral analyses of past relative sea-level oscillations as represented by the ages of 57 Phanerozoic (the last 545 Myr) stratigraphic sequence boundaries from the Canadian Arctic show a strong spectral peak at 32 Myr (>99.9% confidence). These findings concur with previous reports of significant cycles with periods of around 30 Myr in various records of fluctuations of sea level, and in potentially related episodes of tectonism, volcanism, climate, and biotic extinctions. Sequence boundaries commonly coincide with stage boundaries based on biostratigraphy, and are correlated with episodes of extinction and times of flood-basalt volcanism. The connection between tectonics and sea-level variations may come from changes in rates of ocean-floor spreading and subduction, intraplate stresses from plate-reorganizations, and pulsations of hotspot volcanism. These coordinated periodic fluctuations in tectonics, sea level and climate may be modulated by cyclical activity in the Earth’s mantle, although some pacing by astronomical cycles is suspected. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Geoscience Frontiers 11 6 2061 2065 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Sea level Periodicity Sequence boundary Geology QE1-996.5 |
spellingShingle |
Sea level Periodicity Sequence boundary Geology QE1-996.5 Michael R. Rampino Ken Caldeira A 32-million year cycle detected in sea-level fluctuations over the last 545 Myr |
topic_facet |
Sea level Periodicity Sequence boundary Geology QE1-996.5 |
description |
Spectral analyses of past relative sea-level oscillations as represented by the ages of 57 Phanerozoic (the last 545 Myr) stratigraphic sequence boundaries from the Canadian Arctic show a strong spectral peak at 32 Myr (>99.9% confidence). These findings concur with previous reports of significant cycles with periods of around 30 Myr in various records of fluctuations of sea level, and in potentially related episodes of tectonism, volcanism, climate, and biotic extinctions. Sequence boundaries commonly coincide with stage boundaries based on biostratigraphy, and are correlated with episodes of extinction and times of flood-basalt volcanism. The connection between tectonics and sea-level variations may come from changes in rates of ocean-floor spreading and subduction, intraplate stresses from plate-reorganizations, and pulsations of hotspot volcanism. These coordinated periodic fluctuations in tectonics, sea level and climate may be modulated by cyclical activity in the Earth’s mantle, although some pacing by astronomical cycles is suspected. |
format |
Article in Journal/Newspaper |
author |
Michael R. Rampino Ken Caldeira |
author_facet |
Michael R. Rampino Ken Caldeira |
author_sort |
Michael R. Rampino |
title |
A 32-million year cycle detected in sea-level fluctuations over the last 545 Myr |
title_short |
A 32-million year cycle detected in sea-level fluctuations over the last 545 Myr |
title_full |
A 32-million year cycle detected in sea-level fluctuations over the last 545 Myr |
title_fullStr |
A 32-million year cycle detected in sea-level fluctuations over the last 545 Myr |
title_full_unstemmed |
A 32-million year cycle detected in sea-level fluctuations over the last 545 Myr |
title_sort |
32-million year cycle detected in sea-level fluctuations over the last 545 myr |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.gsf.2020.06.005 https://doaj.org/article/30b488f170a6475ea863166acdcb9eda |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Geoscience Frontiers, Vol 11, Iss 6, Pp 2061-2065 (2020) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1674987120301444 https://doaj.org/toc/1674-9871 1674-9871 doi:10.1016/j.gsf.2020.06.005 https://doaj.org/article/30b488f170a6475ea863166acdcb9eda |
op_doi |
https://doi.org/10.1016/j.gsf.2020.06.005 |
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Geoscience Frontiers |
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11 |
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6 |
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2061 |
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2065 |
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1778521301561901056 |