Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction
Severe changes in ocean redox, nutrient cycling, and marine productivity accompanied most Phanerozoic mass extinctions. However, evidence for marine photic zone euxinia (PZE) as a globally important extinction mechanism for the end-Triassic extinction (ETE) is currently lacking. Fossil molecular (bi...
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| Format: | Article |
| Language: | en_US |
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Geological Society of America
2017
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| Online Access: | http://hdl.handle.net/1721.1/107847 https://orcid.org/0000-0002-7144-8537 |
| _version_ | 1826198565234409472 |
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| author | Kasprak, A. H. Price-Waldman, R. Williford, K. H. Schoepfer, S. D. Haggart, J. W. Ward, P. D. Whiteside, J. H. Sepulveda, Julio C Summons, Roger E |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Kasprak, A. H. Price-Waldman, R. Williford, K. H. Schoepfer, S. D. Haggart, J. W. Ward, P. D. Whiteside, J. H. Sepulveda, Julio C Summons, Roger E |
| author_sort | Kasprak, A. H. |
| collection | MIT |
| description | Severe changes in ocean redox, nutrient cycling, and marine productivity accompanied most Phanerozoic mass extinctions. However, evidence for marine photic zone euxinia (PZE) as a globally important extinction mechanism for the end-Triassic extinction (ETE) is currently lacking. Fossil molecular (biomarker) and nitrogen isotopic records from a sedimentary sequence in western Canada provide the first conclusive evidence of PZE and disrupted biogeochemistry in neritic waters of the Panthalassic Ocean during the end Triassic. Increasing water-column stratification and deoxygenation across the ETE led to PZE in the Early Jurassic, paralleled by a perturbed nitrogen cycle and ecological turnovers among noncalcifying groups, including eukaryotic algae and prokaryotic plankton. If such conditions developed widely in the Panthalassic Ocean, PZE might have been a potent mechanism for the ETE. |
| first_indexed | 2024-09-23T11:06:52Z |
| format | Article |
| id | mit-1721.1/107847 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:06:52Z |
| publishDate | 2017 |
| publisher | Geological Society of America |
| record_format | dspace |
| spelling | mit-1721.1/1078472022-10-01T01:20:05Z Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction Kasprak, A. H. Price-Waldman, R. Williford, K. H. Schoepfer, S. D. Haggart, J. W. Ward, P. D. Whiteside, J. H. Sepulveda, Julio C Summons, Roger E Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Sepulveda, Julio C Summons, Roger E Severe changes in ocean redox, nutrient cycling, and marine productivity accompanied most Phanerozoic mass extinctions. However, evidence for marine photic zone euxinia (PZE) as a globally important extinction mechanism for the end-Triassic extinction (ETE) is currently lacking. Fossil molecular (biomarker) and nitrogen isotopic records from a sedimentary sequence in western Canada provide the first conclusive evidence of PZE and disrupted biogeochemistry in neritic waters of the Panthalassic Ocean during the end Triassic. Increasing water-column stratification and deoxygenation across the ETE led to PZE in the Early Jurassic, paralleled by a perturbed nitrogen cycle and ecological turnovers among noncalcifying groups, including eukaryotic algae and prokaryotic plankton. If such conditions developed widely in the Panthalassic Ocean, PZE might have been a potent mechanism for the ETE. National Science Foundation (U.S.) (Grant EAR-1147402) Exobiology Program (U.S.) (Grants NNX09AM88G and NNA08CN84A) American Association of Petroleum Geologists (Grant-In-Aid) Mary-Hill and Bevan M. French Fund for Impact Geology 2017-04-05T15:18:55Z 2017-04-05T15:18:55Z 2015-02 2014-10 Article http://purl.org/eprint/type/JournalArticle 0091-7613 1943-2682 http://hdl.handle.net/1721.1/107847 Kasprak, A. H. et al. “Episodic Photic Zone Euxinia in the Northeastern Panthalassic Ocean during the End-Triassic Extinction.” Geology 43.4 (2015): 307–310. https://orcid.org/0000-0002-7144-8537 en_US http://dx.doi.org/10.1130/g36371.1 Geology Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Geological Society of America Other repository |
| spellingShingle | Kasprak, A. H. Price-Waldman, R. Williford, K. H. Schoepfer, S. D. Haggart, J. W. Ward, P. D. Whiteside, J. H. Sepulveda, Julio C Summons, Roger E Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction |
| title | Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction |
| title_full | Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction |
| title_fullStr | Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction |
| title_full_unstemmed | Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction |
| title_short | Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction |
| title_sort | episodic photic zone euxinia in the northeastern panthalassic ocean during the end triassic extinction |
| url | http://hdl.handle.net/1721.1/107847 https://orcid.org/0000-0002-7144-8537 |
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