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impact structure

   Also found in: Wikipedia 0.03 sec.
impact structure
n.
A large geologic structure, such as a crater or astrobleme, created by the violent collision between a planet and a space projectile such as a comet or meteor.


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The Vredefort impact structure, named after the city in South Africa that was built in the center of the ancient bull's-eye, was created by a collision about 2.
Presto, change-O! Extraterrestrial impacts transform Earth's surface ... by Perkins, Sid / Science News
Satellite imagery shows a very circular feature near Kercher Lake, and it appears to be a possible meteorite impact structure approximately 9 km in diameter.
Update on Thunder Sword's Uranium Projects in the Athabasca Basin, ... by Business Wire
That age struck me straight away because it's the same age as the Manicouagan impact structure here in Canada," says Spray.
Target Earth: geologists link a chain of craters by Monastersky, Richard / Science News
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