Skip to comments.Scientists Find Possible Second Subglacial Impact Crater in Northwest Greenland
Posted on 02/12/2019 2:54:00 PM PST by ETL
Following the discovery of the 19.2-mile wide Hiawatha impact crater beneath the northwest margin of the Greenland Ice Sheet, Dr. Joe MacGregor of NASAs Goddard Space Flight Center and colleagues explored satellite and aerogeophysical data in search of additional such craters and found a possible second impact crater that is 22.7 miles wide and 114 miles southeast of the Hiawatha crater.
The discovery is described in a paper in the journal Geophysical Research Letters. ..."
Following the finding of that first crater, Dr. MacGregor and co-authors checked topographic maps of the rock beneath Greenlands ice for signs of other craters.
Using imagery of the ice surface from NASAs Terra and Aqua satellites, they soon noticed a circular pattern some 114 miles to the southeast of Hiawatha Glacier. The same circular pattern also showed up in ArcticDEM, a high-resolution digital elevation model of the entire Arctic derived from commercial satellite imagery.
To confirm their suspicion about the possible presence of a second impact crater, the researchers studied the raw radar images that are used to map the topography of the bedrock beneath the ice, including those collected by NASAs Operation IceBridge.
What they saw under the ice were several distinctive features of a complex impact crater: a flat, bowl-shaped depression in the bedrock that was surrounded by an elevated rim and centrally located peaks, which form when the crater floor equilibrates post-impact.
(Excerpt) Read more at sci-news.com ...
If not his fault, then Bush’s fault.
Let me guess and it’s growing really fast.
” Hiawatha impact crater “ Do they mean ‘lie-a-watha’ in reference to princess running beaver?
That’s where I dropped it!
meteor impacts that titled the earth and caused the Flood?
aerogeophysical - they just made that up
We live in a great celestial shooting gallery. We are the target.
Could be, certainly could be a second impact crater.
Can this one be Pocahontas?
Fist named Bada
Second named Bing
19.2 and 22.7 miles wide... I can’t even begin to imagine what damage those two meteorites would do to whatever was living on earth, way back then.
Considering the Chicxulub (suspected dinosaur killer 65mya) impact was by a body somewhere between 7 and 50 KM diameter, and said impactor’s crater is over 150 kilometres (93 miles) in diameter...
I doubt that it was more than a couple of bad years weather for the rest of the planet. For those in the immediate area, however, it was likely pretty ugly for a long while!
It's nothing compared to the Existential Threat of man-made global warming:
Thanks Robert A Cook PE for the ping, and thanks ETL for the topic.
Amy’s an “Existential Idiot”.
#2. It’s nobody’s FAULT. It is a crater. There is a difference.
A “fault” is what is going to do justice to the commies in California when it takes SF and LA into the Mariannas Trench, for ever.
My comment just went right over your head.
It is their fault because everything in the world that is bad must be the fault of some hated Republican President.
Sorry if your comment went over my head. I was diving under the glaciers looking for Judge Crater too.
Since there are two large craters under the glaciers, they must be somebody’s FAULT. /sarc
[I’ll duck now and avoid waiting for your next comet]
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