The largest crater in the world is buried in Australia
Two geologists have found evidence of what appears to be the largest asteroid impact on the planet. The landmass, named the Deniliquin structure, is hidden deep underground in Australia. In an article published in the journal Tectonophysics , researchers explain that the crater could extend up to 520 kilometers in diameter. The size of the impact is considerably larger than those already known so far, such as Vredefort in South Africa, 300 km wide, and Chicxulub in Mexico, 170 km wide.
Geologists Andrew Glikson and Tony Yeates named the probable crater 'Deniliquin structure'. It is located deep in the territory of New South Wales, in Australia. Scientists have studied the structure since 1995, when ma Phone Number List gnetic surveys in the Murray Basin revealed a symmetrical wavy pattern. From 2015 to 2020 geologists' efforts increased to verify the area.
In the territory there are circle-shaped crust fractures that extend for hundreds of kilometers and igneous layers of rocks covering their cracks. The tracks start from a central point or a collision zone . Magnetic signatures, faults and sheets of magma injected into the spaces are classic signs of impact structures, scientists warn.
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Glickson and Yeates accept that all evidence for Deniliquin's structure is the result of geophysical measurements obtained from the surface. Confirmation of the structure's existence will come when scientists drill deeper and obtain samples. The largest impact footprint on the planet in Australia would be comparable to the size of the urban area of cities such as Quito, Medellín, Israel or New Orleans.
In an article for The Conversation, Andrew Glickson continued his hypothesis, beyond those presented in the original scientific paper, Geophysics and origin of the Deniliquin multiple-ring feature, Southeast Australia. The geologist imagines that the impact could have occurred in the late Ordovician Era, 460 million years ago, when Australia was still part of the supercontinent Gondwana. The asteroid could be responsible for triggering the Hirnantian glaciation stage, a mass extinction event that eliminated 85% of the planet's species during that period.
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Australia has a significant history with impact structures. In its almost 8 million square kilometers, there is the oldest crater in the world, 2.2 billion years old, in addition to 37 confirmed impact structures and another 43 potential ones.
Analysis of craters on the moon and other space bodies indicates that Earth and the planets of the Solar System faced a period of constant steroid collision. The event was named the Late Heavy Bombardment and is estimated to have occurred between 4.1 and 3.8 billion years ago.
The risk of an asteroid collision with the planet is low, but special agencies and governments around the world monitor the sky 24 hours a day. In addition to developing strategies to divert the orbit of a rock through a kinetic shot, they are currently mapping the position of bodies with potential impact on Earth.
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