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Showing results for tags 'impact crater'.
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https://www.bbc.com/news/science-environment-62575581
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Late Paleocene age for Greenland’s Hiawatha impact structure
Oxytropidoceras posted a topic in Fossil News
Controversial impact crater under Greenland’s ice is surprisingly ancient New date of 58 million years undercuts idea that strike triggered recent 1000-year plunge in temperatures By Paul Voose, Science News, March, 9, 2022 Giant impact crater in Greenland occurred a few million years after dinosaurs went extinct by University of Copenhagen, PhysOrg Wikipedia article discussing Hiawatha impact structure The open access paper is: Kenny, G. G., and others, 2022, A Late Paleocene age for Greenland’s Hiawatha impact structure. Science Advances. vol. 8, no. 10 Yours, Paul H.-
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I got one of these tektites almost 20 years ago in Vietnam and have been intrigued by the mystery of this 800,000 year old impact event since. This type of tektites has been found in Antarctica, Australia, and Asia. Now scientists may have found the impact crater hiding under large Laotian lava lake. https://astronomy.com/news/2020/01/crater-found-from-asteroid-that-covered-10-of-earths-surface-in-debris
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A Possible Second Large Subglacial Impact Crater in Northwest Greenland
Oxytropidoceras posted a topic in Fossil News
Scientist May Have Discovered Massive Crater Under Greenland Ice Sheet, Daily Beast, Feb. 2019 https://www.thedailybeast.com/scientist-may-have-discovered-massive-crater-under-greenland-ice-sheet Photos: Craters Hidden Beneath the Greenland Ice Sheet, Live Science, February 12, 2019 https://www.livescience.com/64755-photos-greenland-craters.html The open access paper is: Joseph A. MacGregor, William F. Bottke, Jr., Mark A. Fahnestock, Jeremy P. Harbeck, Kurt H. Kjær, John D. Paden, David E. Stillman, and Michael Studinger, 2019, A Possible Second Large Subglacial Impact Crater in Northwest Greenland First published: 11 February 2019 https://doi.org/10.1029/2018GL078126 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL078126 The paper states: "Based on the dated radiostratigraphy of the Greenland Ice Sheet, available for pre-2014 radar data only, the ice overlying the structure is at least 79 ka old (Figures 1e–1h; MacGregor et al., 2015)." Yours, Paul H. -
Was the Falkland Islands region hit by a giant asteroid?
Oxytropidoceras posted a topic in Fossil News
Stone, P. and McCarthy, D., 2018. Were the Falkland Islands hit by a giant asteroid 250 million years ago?. Falkland Islands Journal, 11(2), pp.42-54. http://nora.nerc.ac.uk/id/eprint/521520/ http://nora.nerc.ac.uk/id/eprint/521520/1/STONE AND MCCARTHY FIJ 2018pp 42-54.pdf Yours, Paul H.- 1 reply
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Giant Impact Crater Might Be Hidden Under Greenland Icesheet
Oxytropidoceras posted a topic in Fossil News
This is interesting. Scientists Spot What May Be a Giant Impact Crater Hidden Under Greenland Ice By Meghan Bartels, Space.com, November 14, 2018 https://www.space.com/42431-giant-impact-crater-hidden-under-greenland-ice.html The open access paper is: Kurt H. Kjær, Nicolaj K. Larsen, Tobias Binder, and many others A large impact crater beneath Hiawatha Glacier in northwest Greenland. Science Advances 14 Nov 2018:Vol. 4, no. 11, eaar8173 DOI: 10.1126/sciadv.aar8173 http://advances.sciencemag.org/content/4/11/eaar8173 Yours, Paul H.- 3 replies
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Impact Crater Linked to Martian Tsunamis By Paul Rincon, BBC News website, March 26, 2017 http://www.bbc.com/news/science-environment-39394583 Water On Mars: Researchers Link Lomonosov Crater To Ancient Martian Tsunamis by Avaneesh IBT, March 26, 2017 http://www.ibtimes.com/water-mars-researchers-link-lomonosov-crater-ancient-martian-tsunamis-2515241 The paper is: Costard, F., A. Séjourné, K. Kelfoun, S. Clifford, F. Lavigne, I. Di Pietro, and S. Bouley (2017), Modeling tsunami propagation and the emplacement of thumbprint terrain in an early Mars ocean, Journal Geophysical Research Planets, 122, doi:10.1002/2016JE005230 http://onlinelibrary.wiley.com/doi/10.1002/2016JE005230/full An article about studying Mars is: Studying Martian Rocks Without Leaving Planet Earth Matching Martian rock formations to those found on Earth can help researchers learn more about the Red Planet. By Alexandra Branscombe, AGU, March 1, 2017 https://eos.org/research-spotlights/studying-martian-rocks-without-leaving-planet-earth Other articles about geological research at https://eos.org/research-spotlights Yours, Paul H.
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