earth:geohammers:m_bce_events
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earth:geohammers:m_bce_events [2019/03/09 13:40] khavikanum |
earth:geohammers:m_bce_events [2020/06/13 13:45] khavikanum |
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| [[https://phys.org/news/2018-05-supernovae-responsible-mass-extinctions.html]] | [[https://phys.org/news/2018-05-supernovae-responsible-mass-extinctions.html]] | ||
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| + | ==== McCullen Creek & Grey's Landing Supereruptions, 8.7-9M BCE ==== | ||
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| + | The hot spot over Yellowstone erupted twice within a 300,000y period -- the second one being among the 'top five eruptions of all time' according to Thomas Knott. The McCullen Creek eruption at 8.99Ma was a VEI 8.6, and the Grey's Landing eruption at 8.72Ma was a VEI of 8.8. | ||
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| + | Knott, Branney, et al, Geology, JUN2020. "Discovery of two new super-eruptions from Yellowstone hotspot track (USA): Is the Yellowstone hotspot waning?" [[https://doi.org/10.1130/G47384.1]]\\ | ||
| ==== Homininae End, 8 to 10M BCE ==== | ==== Homininae End, 8 to 10M BCE ==== | ||
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| Phys. Rev. Lett. 113, 231102.\\ | Phys. Rev. Lett. 113, 231102.\\ | ||
| - | ==== Scafell Eruption, Late Ordovician Extinction, 443M BCE ==== | + | ==== Late Ordovician Extinction, 443M BCE ==== |
| - | Located in England, this VEI 8 eruption took place at the end of the Ordovician, when some 85% of all life on earth went extinct with a rapid advance and retreat of glaciers. How much Scafell affected the glacial advance and retreat is currently unknown, as Gondwana was also drifting over the South Pole at that time, forming ice caps and sequestering global water. | + | Located in England, the Scafell Eruption (VEI 8) took place at the end of the Ordovician, when some 85% of all life on earth went extinct with a rapid advance and retreat of glaciers. How much Scafell affected the glacial advance and retreat is currently unknown, as Gondwana was also drifting over the South Pole at that time, forming ice caps and sequestering global water. A supernova has been fingered as a potential culprit, as well. |
| [[http://en.wikipedia.org/wiki/Scafells]]\\ | [[http://en.wikipedia.org/wiki/Scafells]]\\ | ||
| Birkett, B. 2007. __Scafell, Portrait of a Mountain__ London: Frances Lincoln Limited. p12\\ | Birkett, B. 2007. __Scafell, Portrait of a Mountain__ London: Frances Lincoln Limited. p12\\ | ||
| [[http://en.wikipedia.org/wiki/Ordovician]]\\ | [[http://en.wikipedia.org/wiki/Ordovician]]\\ | ||
| + | [[https://en.wikipedia.org/wiki/Ordovician%E2%80%93Silurian_extinction_events]]\\ | ||
| + | [[https://en.wikipedia.org/wiki/Ordovician%E2%80%93Silurian_extinction_events]]\\ | ||
| + | [[https://en.wikipedia.org/wiki/Near-Earth_supernova]]\\ | ||
| ==== Andean-Saharan Glaciation, 450M BCE ==== | ==== Andean-Saharan Glaciation, 450M BCE ==== | ||
earth/geohammers/m_bce_events.txt ยท Last modified: 2022/12/25 17:55 by khavikanum
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