He writes about it Sky news.
“By studying tiny crystals of the mineral zircon in the rocks of the Pilbara Craton in Australia, which are the best-preserved remnants of the Earth’s ancient crust, we found evidence of these giant meteorite impacts,” said Dr. Johnson of Curtin University (Australia).
The publication reports that the deposits of these minerals are among the oldest on Earth, and were previously evidence of the earliest known life on land.
“Examination of the oxygen isotope composition of these zircon crystals revealed a top-down process that begins with the melting of rocks near the surface and progresses deeper, consistent with the geological effect of a giant meteorite impact,” explained Dr. Johnson.
According to him, the study provides the first convincing evidence that the processes that eventually formed the continents began with the impacts of giant meteorites. Understanding how Earth’s continents formed and continue to develop is crucial, the scientists explained, because we are so dependent on their mineral deposits.
“The continents contain critical metals such as lithium, tin and nickel, things needed for new green technologies, necessary to meet our commitment to climate change mitigation,” the scientist said.
- On July 3, we wrote that scientists are slowly but surely approaching a complete map of the bottom of the world’s oceans. Currently, the modern map of the ocean floor has a little less than a quarter of the total area under water – 23.4%.
- On July 26, NASA scientists showed what the new James Webb space telescope is capable of by comparing its images with those of the Hubble telescope.
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