The Sudbury Basin, which is the world's second-largest impact crater, was likely formed by an enormous comet that battered Earth more than 1.8 billion years ago, new research suggests.
[Crash! 10 Biggest Impact Craters On Earth] Hole in the Earth The Sudbury Basin is a roughly elliptical crater that measures about 37 miles by 18 miles (60 kilometers by 30 kilometers), located onEarth has relatively few impact craters. Many objects collide with the Moon or burn up in the atmosphere before hitting the ground. When impactors do reach Earth’s surface, our active planet slowly erases the evidence. Erosion, tectonic movement, and volcanic activity make ancient craters difficult to see.
The study’s authors note that just because we’ve already found all of the likely large impact craters on Earth doesn’t mean there aren’t more to discover. The real opportunity, they write
Eighth is the 106-186.411-mile radius Chicxulub Crater in Yucatan, Mexico, which hit 65 million years ago. This particular impact event has been confirmed as having caused mass extinction on earth at that time. Ninth is the 62.1371-mile radius Popigai Crater in Siberia, Russia, which hit 35.7 million years ago.
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