The largest known asteroid impact structure on Earth is buried in southeast Australia, new evidence suggests

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The largest known asteroid impact structure on Earth is buried in southeast Australia, new evidence suggests
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The Deniliquin structure could be up to 520 kilometers wide.

suggests Earth and the other planets in the Solar System were subject to intense asteroid bombardments until about 3.2 billion years ago, and sporadically since., named after father and son scientists Luis and Walter Alvarez, explains how non-avian dinosaurs were wiped out as a result of a large asteroid strike some 66 million years ago., have been the target of numerous asteroid impacts.

As you'll recall with the pool and pebble analogy, when a large asteroid hits Earth, the underlying crust responds with a transient elastic rebound that produces Such domes, which can slowly erode and/or become buried through time, may be all that’s preserved from the original impact structure. They represent the deep-seated"root zone" of an impact. Famous examples are found in the Vredefort impact structure and the 170-km-wide in Mexico.

The Deniliquin structure has all the features that would be expected from a large-scale impact structure. For instance, magnetic readings of the area reveal a symmetrical rippling pattern in the crust around the structure's core. This was likely produced during the impact as extremely high temperatures created intense magnetic forces.

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