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Old 11-15-2018, 08:51 PM   #1
mahdavi3d
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Default Massive Crater Discovered Under Greenland Ice

nasa.gov : International Team, NASA Make Unexpected Discovery Under Greenland Ice

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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.
{...}

Two views of the Hiawatha crater region: one covered by the Greenland Ice Sheet, the other showing the topography of the rock beneath the ice sheet, including the crater.
Credits: NASA/Cindy Starr


Radar data from an intensive aerial survey of the Hiawatha crater in May 2016 is shown here in aqua-colored curtains. A blue arrow points to the central peak of the crater.
Credits: NASA/Cindy Starr



---------- Post added 11-15-18 at 08:51 PM ---------- Previous post was 11-14-18 at 11:18 PM ----------

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Old 02-12-2019, 11:17 AM   #2
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phys.org : NASA finds possible second impact crater under Greenland ice
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