boy zone Earth’s continents were formed by giant meteorite impacts that were very common during the first billion years of our planet’s four-and-a-half billion years of history, according to the results of the latest Curtin research, which offered the strongest evidence yet Is.
Dr Tim Johnson of the Curtin School of Earth and Planetary Sciences said the continents that originally formed at the site of a giant meteorite impact had been around for decades, but until now there was little solid evidence to support the theory.
“By examining small crystals of the mineral zircon in rocks from the Pilbara Craton in Western Australia, representing the best-preserved remains of ancient crust on Earth, we found evidence of this massive meteorite impact,” Dr Johnson said.
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He said, “Studying the oxygen isotopic composition in these zircon crystals reveals a ‘top-down’ process that begins with the melting of rocks near the surface and continues at depth, consistent with the geologic effects of giant meteorite impacts.” ”
“Our research provides strong evidence that the process of continent formation was triggered by a giant meteorite impact, similar to the extinction of the dinosaurs, but billions of years ago,” he said.
Dr Johnson said the formation and continued development of Earth’s continents was very important, noting that these landmasses host most of Earth’s biomass, the entire humanity, and nearly all of the planet’s important mineral deposits.
Dr Johnson said, “Equally important, these continents host important metals such as lithium, lead and nickel, which are essential for the emergence of green technologies necessary to meet our obligations to mitigate climate change.” Huh.”