They see a crater on the Greenland ice that produced the asteroid


Only according to its dimensions it is historic. It is the 25 largest found on the planet

They see a crater on the Greenland ice that produced the asteroid

A map under the rock structure beneath the glacier and the land that surrounds the impact curve / Danish Natural History Museum

In 2015, the University of Copenhagen's geochemist, Kurt Kjær, discovered strange depression under the Greenland Hiawatha glacier. The research now reveals that just what he found was a stroke of more than 30 kilometers wide. Its origin: asteroid.

It is only in its dimensions that the crater is already historic, as it is one of the 25 largest on earth. However, its history and origin is what actually represents science. When and when and how do we have a huge impact on Greenland's icebergs?

It has come to light that not so long ago, at least not in the history of our planet, because the meteorite, which was at least a kilometer wide, created it.

exceptional evidence

As Kjær has explained, occasional discoveries require extra evidence. We have more than 10 years of radar research data, a technology that looks at the ice that we can build a map of topography on the glacier. So in 2015 we came across a big round of depression below the floor. We knew instantly that this was something special but at the same time it was obvious that the origin of depression would be difficult to confirm.

continue investigations

Since then, the last three years have been working and studying the area, taking pictures and using the new radar developed by Kansas University.

You see a round structure at the edge of the glacier, especially when flying high enough. Most of the crater is not visible through the machine window. It's fun to say no one has ever said, "Hello, what's the semi-circular feature there?" From this machine, it is sophisticated and difficult to see unless you already know it exists.

With satellite imagery taken with a low solar angle that highlights the overcast valleys and valleys in the terrain, you can see in these images the whole circle of the crater.

Kjær has also explained that a stranger reminded him from the beginning of the Cape York meteor that crashed in Greenland about 10,000 years ago, the same that left large pieces of iron scattered in the same area as the glacier, could there be a connection? impact on the event?

Recently published work can not be inferred that this is the case, but they present a number of compelling evidence suggesting that the crater probably occurred in the last 100,000 years.

Geochemical analysis of sediments close to the glacier also showed effects processes that demonstrated the presence of iron. These include the quartz usually found in the collision zones, and the glass formed from the ceramic silica against the high impact heat.

For age, scientists believe that their evidence is strong enough to think that Greenland has to freeze.

It is difficult to be wrong if we think that the range covers 3 million years ago only 12,000 years ago to the end of the last Ice Age. According to Kjær: I think it happened when Greenland was covered with ice and therefore melt a significant amount of melting water. This melting water goes south to a sensitive point in the climate system.

they want to know the exact date

However, they try to drill through the ice to take samples of bedrock, which can be used for refreshing and accurate daytime effects.

Kraper is as large as the window he has opened for science. His research raises all kinds of questions, such as the possibility of asteroid rain or the fact that the impact caused a global cooling event that could greatly affect people's aging populations.


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