MADRID, 23 Oct. (@ CIENCIAPLUS) –
suffered Earth 458 million years ago a double impact asteroid, which is the origin of visible craters in Sweden today. According to an international team of scientists, led by Jens Ormo, Centre for Astrobiology (CAB-INTA-CSIC) , this event might be “one of the greatest cosmic catastrophes” in the history of the solar system.
That impact caused the break and scatter asteroids big chunks of rock. Two of these pieces crashed in shallow seas that covered the current Scandinavia, causing uplift of the crust .
This work, which has been published in ‘Scientific Reports’ , noted as ‘signature’ of this event –a central Sweden about 20 kilometers south of the city of Oestersund– specifically the crater Lockne 7 5 km away and close to another crater known as Malingen. They say Crater Lockne was created by an object about 600 meters long, while the Malingen measured 150 meters.
The study supports the suspicion that long , related these craters, just 16 kilometers away, with an “extremely rare” event space caused by asteroids that travel in pairs.
Ormo and his team have carried out a hole in the Swedish craters for traces of sediment disturbed by a shock impact. They have also studied the halo ring –a ejecta debris thrown by violenta– break that should land, according to their studies, up to tens of kilometers away from the inner crater.
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