Disir
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"The two meteorite impacts occurred at the same time, 458 million years ago, and formed these two craters," says Erik Sturkell, Professor of Geophysics at the University of Gothenburg.
Erik Sturkell and his research colleagues found one of the craters 20 kilometres south of Östersund in Brunsflo. This is an enormous crater, with a diameter of 7.5 kilometres. The smaller crater is located 16 kilometres from there, and has a diameter of 700 metres.
An era of meteorites
The two meteorite impacts 458 million years ago were not the only ones to strike Earth at this time.
"Around 470 million years ago, two large asteroids collided in the asteroid belt between Mars and Jupiter, and many fragments were thrown off in new orbits. Many of these crashed on Earth, such as these two in Jämtland," says Erik Sturkell.
Jämtland was under the sea at the time, with a water depth of 500 metres at the points where two meteorites simultaneously stuck.
Globally unique double crater identified in Sweden - University of Gothenburg, Sweden
This is kind of cool.
Erik Sturkell and his research colleagues found one of the craters 20 kilometres south of Östersund in Brunsflo. This is an enormous crater, with a diameter of 7.5 kilometres. The smaller crater is located 16 kilometres from there, and has a diameter of 700 metres.
An era of meteorites
The two meteorite impacts 458 million years ago were not the only ones to strike Earth at this time.
"Around 470 million years ago, two large asteroids collided in the asteroid belt between Mars and Jupiter, and many fragments were thrown off in new orbits. Many of these crashed on Earth, such as these two in Jämtland," says Erik Sturkell.
Jämtland was under the sea at the time, with a water depth of 500 metres at the points where two meteorites simultaneously stuck.
Globally unique double crater identified in Sweden - University of Gothenburg, Sweden
This is kind of cool.
