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2018-11-14. International Team, NASA Make Unexpected Discovery Under Greenland Ice.

posted Nov 19, 2018, 1:09 PM by Alan Gould   [ updated Feb 18, 2019, 8:39 PM ]
NASA RELEASE 18-099. [https://www.nasa.gov/press-release/international-team-nasa-make-unexpected-discovery-under-greenland-ice] For GSS A Changing Cosmos chapter 1. Excerpt: An international team of researchers, including a NASA glaciologist, has discovered a large meteorite impact crater hiding beneath more than a half-mile of ice in northwest Greenland. The crater — the first of any size found under the Greenland ice sheet — is one of the 25 largest impact craters on Earth, measuring roughly 1,000 feet deep and more than 19 miles in diameter, an area slightly larger than that inside Washington’s Capital Beltway.... See also 2019-02-12. Radar reveals a second potential impact crater under Greenland’s ice. By Paul Voosen, Science Magazine. [https://www.sciencemag.org/news/2019/02/radar-reveals-second-potential-impact-crater-under-greenland-s-ice]