Found a giant meteorite 500 million years ago
Aerial and underground survey results helped US experts determine the existence of an ancient impact crater beneath a town in the state of Iowa (USA).
According to a report in Earth Magazine, the results of geophysical and hydrographic surveys identified a collision crater about 5.5 km across - nearly 5 times the size of Barringer crater in Arizona (USA).
'We now have three distinct and confirmed data groups about the presence and geometry of a collision hole,' says Andy Kass, a geophysicist at the US Geological Survey. in Denver.
Giant impact crater beneath the town of Decorah - (Photo: American Geological Survey)
The existence of the impact crater was first reported in 2008 when geologists studied the cut in wells near the town of Decorah, northeastern Iowa, and suddenly discovered evidence of sediment. Shale has never been known before.
If you look at the surface, Decorah is a beautiful town and nothing shows that it is lying on a collision hole.
Based on the size of the impact crater, scientists estimated it to be a remnant when a 228m-diameter asteroid crashed into the area about 500 million years ago.
Statistically, similarly sized asteroids are calculated to cycle to the Earth's surface in a period of 30,000 to 60,000 years.
- Huge meteorites make the Earth hot to 2,300 degrees Celsius
- What's the weirdest meteorite in the UK?
- Found a meteorite pattern falling in America
- 3 billion tons of meteorite fall to Earth
- Discovered a $ 5.3 million meteorite in the field
- Suffering from meteorite disaster but why dinosaurs are extinct, birds are not?
- Giant meteors are about to fly across Earth
- Giant meteors are about to fly through the earth
- Detected giant ivory over 2 million years old
- NASA says a giant meteorite will fly over the Earth in the next 48 hours
- A meteorite as big as the Great Pyramid is about to fly over the Earth
- A giant meteorite just flew over Earth