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 [2022/05/02 22:42] khavikanum |
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| [[http://www.physorg.com/news183278038.html]] | [[http://www.physorg.com/news183278038.html]] | ||
| - | ==== //Homo erectus// Diverges, 1.8M BCE ==== | + | ==== Homo erectus Diverges, 1.8M BCE ==== |
| Earliest //Homo erectus// skeletons found, although many put the divergence at anywhere from 2.1M to 2.8M BCE. | Earliest //Homo erectus// skeletons found, although many put the divergence at anywhere from 2.1M to 2.8M BCE. | ||
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| A meteor strike forms a 12km wide crater and lake, 100km north of the Arctic Circle and 360km from Pevek, Russia. The Siberian crater was drilled for sediment core analysis and climate information by Julie Brigham-Grette and her team form the University of Massachusetts Amherst. | A meteor strike forms a 12km wide crater and lake, 100km north of the Arctic Circle and 360km from Pevek, Russia. The Siberian crater was drilled for sediment core analysis and climate information by Julie Brigham-Grette and her team form the University of Massachusetts Amherst. | ||
| - | Alexandra Witze. 2010. "Siberian lake yields climate record: winter drilling project also penetrates ancient impact crater." //Science News//. 178(11):p13. | + | The megaladon sharks go extinct during this time. |
| + | |||
| + | Alexandra Witze. 2010. "Siberian lake yields climate record: winter drilling project also penetrates ancient impact crater." //Science News//. 178(11):p13.\\ | ||
| + | [[https://www.popsci.com/story/science/megalodon-alive-myth/?utm_source=digg]]\\ | ||
| ==== Australpithecines Diverge, 4M BCE ==== | ==== Australpithecines Diverge, 4M BCE ==== | ||
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| [[http://en.wikipedia.org/wiki/Karakul_(Tajikistan)]] | [[http://en.wikipedia.org/wiki/Karakul_(Tajikistan)]] | ||
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| + | ==== Miocene Ends / Pliocene Begins, 5.333M BCE ==== | ||
| + | |||
| + | A global warm period ends, and glaciations begin. | ||
| + | |||
| + | [[https://en.wikipedia.org/wiki/Miocene]]\\ | ||
| ==== Chimpanzee Diversion, 6.3M BCE ==== | ==== Chimpanzee Diversion, 6.3M BCE ==== | ||
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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]] | ||
| + | |||
| + | ==== McCullen Creek & Grey's Landing Supereruptions, 8.7-9M BCE ==== | ||
| + | |||
| + | 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. | ||
| + | |||
| + | 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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| [[http://geosphere.gsapubs.org/content/9/4/864.abstract]]\\ | [[http://geosphere.gsapubs.org/content/9/4/864.abstract]]\\ | ||
| [[http://en.wikipedia.org/wiki/Marysvale_volcanic_field]] | [[http://en.wikipedia.org/wiki/Marysvale_volcanic_field]] | ||
| + | |||
| + | ==== ERV-FC Virus, 33M BCE ==== | ||
| + | |||
| + | A retrovirus began to infect mammals, and it did so for about 15M years. | ||
| + | |||
| + | [[https://en.wikipedia.org/wiki/ERV-Fc]] | ||
| ==== Beginning of the Oligocene Epoch, 34M BCE ==== | ==== Beginning of the Oligocene Epoch, 34M BCE ==== | ||
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| This rise in temperature likely drove out much of the oxygen in the world's oceans, causing a large die off of marine animals. The world would have shifted to a warmer and wetter overall climate, a major selection event in and of itself. | This rise in temperature likely drove out much of the oxygen in the world's oceans, causing a large die off of marine animals. The world would have shifted to a warmer and wetter overall climate, a major selection event in and of itself. | ||
| + | |||
| + | ==== Hiawatha Crater, 58M BCE ==== | ||
| + | |||
| + | Originally thought to be only 13,000 years old, later analyses indicate that Hiawatha Crater on Greenland is much, much older. | ||
| + | |||
| + | [[https://phys.org/news/2022-03-giant-impact-crater-greenland-million.html]]\\ | ||
| ==== K-T Boundary, 65M BCE ==== | ==== K-T Boundary, 65M BCE ==== | ||
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| [[http://phys.org/news/2012-06-fungi-coal-formation-advance-future.html]] | [[http://phys.org/news/2012-06-fungi-coal-formation-advance-future.html]] | ||
| + | |||
| + | ==== KGB Carbon Dioxide Jump, 304M BCE ==== | ||
| + | |||
| + | Kasimovian-Gzhelian boundary (KGB) records doubling in CO2 from 350ppm to 700ppm within just 300,000 years. | ||
| + | |||
| + | [[https://phys.org/news/2022-05-carbon-climate-ocean-anoxia-ancient.html]]\\ | ||
| ==== End Devonian Impacts, Karoo Glaciation, 360M BCE ==== | ==== End Devonian Impacts, Karoo Glaciation, 360M 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 · Last modified: 2022/12/25 17:55 by khavikanum
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