An international team of researchers said an impressive discovery in the middle of the northern iceberg of Greenland is a huge crater with a diameter of at least 31 kilometers – more than the diameter of Atika or Paris, caused by a one-kilometer long meteorite drop.
The impact could have taken place relatively recently, even before 12,000 years.
Scientists from Denmark, Germany (Alfred Waageninger) and the US (Kansas University), led by Professor Kurt Kayar of Copenhagen University, who published in the Science Advances magazine, suspected it to be one of the 25 largest landing craters on Earth.
It is estimated that the "culprit" of the shaker is a meteorite, consisting mainly of iron that fell to Greenland and then "buried" under the ice nearly a kilometer thick. This is the first time a crater of any size has been found under the ice of our planet. The initial discovery was made in 2015 in the Hiawatha Glacial Zone, but it took three years to confirm with further research on aerial radar that "sees" under the ice.
"The crater is impressively well-preserved, which is unexpected, because the glaciers have an incredibly high corrosion force that would normally erase the traces of the impact. This does not mean that the crater is quite new geologically. Until now, it has not been possible to directly identify the crater, but we believe that it was created after ice cover with Greenland, so it's less than three million years old and probably the latest 12,000 years ago at the end of the last ice age, "Qiaier said.
The Copenhagen Museum of Geology already has 20 tons of iron, which was found near the crater site.
Scientists are interested in how and how much climate and global environmental conditions could affect the fall of such a massive meteorite.