By Will Dunham WASHINGTON (Reuters) - An immense crater in northwestern Greenland, buried under a thick sheet of ice and first spotted in 2015, is muc.
History of Earth Danish and Swedish researchers have dated the enormous Hiawatha impact crater, a 31 km-wide asteroid crater buried under a kilometer of Greenlandic ice. The dating ends speculation that the asteroid impacted after the appearance of humans and opens up a new understanding of Earth’s evolution in the post-dinosaur era.
The crater dates back to 58 million years ago, instead of the previously proposed 13,000 years ago. Greenland shelters beneath its ice sheet the massive Hiawatha crater, also known as the Hiawatha impact crater or Hiawatha meteorite impact crater-which is 31 kilometers (19 miles) wide.
Danish and Swedish researchers have dated the enormous Hiawatha impact crater, a 31 km-wide asteroid crater buried under a kilometer of Greenlandic ice. The dating ends speculation that the asteroid impacted after the appearance of humans and.