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Rapid eruption of the Columbia River flood basalt and correlation with the mid-Miocene climate optimum
Flood basalts, the largest volcanic events in Earth history, are thought to drive global environmental change because they can emit large volumes of CO(2) and SO(2) over short geologic time scales. Eruption of the Columbia River Basalt Group (CRBG) has been linked to elevated atmospheric CO(2) and g...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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American Association for the Advancement of Science
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6154988/ https://www.ncbi.nlm.nih.gov/pubmed/30255148 http://dx.doi.org/10.1126/sciadv.aat8223 |
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author | Kasbohm, Jennifer Schoene, Blair |
author_facet | Kasbohm, Jennifer Schoene, Blair |
author_sort | Kasbohm, Jennifer |
collection | PubMed |
description | Flood basalts, the largest volcanic events in Earth history, are thought to drive global environmental change because they can emit large volumes of CO(2) and SO(2) over short geologic time scales. Eruption of the Columbia River Basalt Group (CRBG) has been linked to elevated atmospheric CO(2) and global warming during the mid-Miocene climate optimum (MMCO) ~16 million years (Ma) ago. However, a causative relationship between volcanism and warming remains speculative, as the timing and tempo of CRBG eruptions is not well known. We use U-Pb geochronology on zircon-bearing volcanic ash beds intercalated within the basalt stratigraphy to build a high-resolution CRBG eruption record. Our data set shows that more than 95% of the CRBG erupted between 16.7 and 15.9 Ma, twice as fast as previous estimates. By suggesting a recalibration of the geomagnetic polarity time scale, these data indicate that the onset of flood volcanism is nearly contemporaneous with that of the MMCO. |
format | Online Article Text |
id | pubmed-6154988 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-61549882018-09-25 Rapid eruption of the Columbia River flood basalt and correlation with the mid-Miocene climate optimum Kasbohm, Jennifer Schoene, Blair Sci Adv Research Articles Flood basalts, the largest volcanic events in Earth history, are thought to drive global environmental change because they can emit large volumes of CO(2) and SO(2) over short geologic time scales. Eruption of the Columbia River Basalt Group (CRBG) has been linked to elevated atmospheric CO(2) and global warming during the mid-Miocene climate optimum (MMCO) ~16 million years (Ma) ago. However, a causative relationship between volcanism and warming remains speculative, as the timing and tempo of CRBG eruptions is not well known. We use U-Pb geochronology on zircon-bearing volcanic ash beds intercalated within the basalt stratigraphy to build a high-resolution CRBG eruption record. Our data set shows that more than 95% of the CRBG erupted between 16.7 and 15.9 Ma, twice as fast as previous estimates. By suggesting a recalibration of the geomagnetic polarity time scale, these data indicate that the onset of flood volcanism is nearly contemporaneous with that of the MMCO. American Association for the Advancement of Science 2018-09-19 /pmc/articles/PMC6154988/ /pubmed/30255148 http://dx.doi.org/10.1126/sciadv.aat8223 Text en Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Kasbohm, Jennifer Schoene, Blair Rapid eruption of the Columbia River flood basalt and correlation with the mid-Miocene climate optimum |
title | Rapid eruption of the Columbia River flood basalt and correlation with the mid-Miocene climate optimum |
title_full | Rapid eruption of the Columbia River flood basalt and correlation with the mid-Miocene climate optimum |
title_fullStr | Rapid eruption of the Columbia River flood basalt and correlation with the mid-Miocene climate optimum |
title_full_unstemmed | Rapid eruption of the Columbia River flood basalt and correlation with the mid-Miocene climate optimum |
title_short | Rapid eruption of the Columbia River flood basalt and correlation with the mid-Miocene climate optimum |
title_sort | rapid eruption of the columbia river flood basalt and correlation with the mid-miocene climate optimum |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6154988/ https://www.ncbi.nlm.nih.gov/pubmed/30255148 http://dx.doi.org/10.1126/sciadv.aat8223 |
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