Title |
Bolide impact triggered the Late Triassic extinction event in equatorial Panthalassa
|
---|---|
Published in |
Scientific Reports, July 2016
|
DOI | 10.1038/srep29609 |
Pubmed ID | |
Authors |
Tetsuji Onoue, Honami Sato, Daisuke Yamashita, Minoru Ikehara, Kazutaka Yasukawa, Koichiro Fujinaga, Yasuhiro Kato, Atsushi Matsuoka |
Abstract |
Extinctions within major pelagic groups (e.g., radiolarians and conodonts) occurred in a stepwise fashion during the last 15 Myr of the Triassic. Although a marked decline in the diversity of pelagic faunas began at the end of the middle Norian, the cause of the middle Norian extinction is uncertain. Here we show a possible link between the end-middle Norian radiolarian extinction and a bolide impact. Two palaeoenvironmental events occurred during the initial phase of the radiolarian extinction interval: (1) a post-impact shutdown of primary and biogenic silica production within a time span of 10(4)-10(5) yr, and (2) a sustained reduction in the sinking flux of radiolarian silica for ~0.3 Myr after the impact. The catastrophic collapse of the pelagic ecosystem at this time was probably the dominant factor responsible for the end-middle Norian conodont extinction. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Japan | 6 | 15% |
France | 1 | 3% |
United States | 1 | 3% |
Argentina | 1 | 3% |
United Kingdom | 1 | 3% |
Unknown | 30 | 75% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 34 | 85% |
Scientists | 5 | 13% |
Science communicators (journalists, bloggers, editors) | 1 | 3% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Estonia | 1 | 2% |
Unknown | 55 | 98% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 9 | 16% |
Researcher | 9 | 16% |
Student > Master | 6 | 11% |
Student > Doctoral Student | 5 | 9% |
Student > Bachelor | 5 | 9% |
Other | 9 | 16% |
Unknown | 13 | 23% |
Readers by discipline | Count | As % |
---|---|---|
Earth and Planetary Sciences | 31 | 55% |
Agricultural and Biological Sciences | 2 | 4% |
Biochemistry, Genetics and Molecular Biology | 2 | 4% |
Environmental Science | 1 | 2% |
Nursing and Health Professions | 1 | 2% |
Other | 5 | 9% |
Unknown | 14 | 25% |