An international team of researchers, led by Professor John Valley, determined the age of the earth's crust with higher accuracy. According to their calculations, it was approximately 4.4 billion years. The countdown begins from the previous phase of the formation of our planet, when it was a red-hot ball covered with molten magma.
This discovery was made possible thanks to a small fragment of zircon crystal found in western Australia. Zircon is perhaps one of the oldest building materials on Earth. His age was determined using atomic sensing technology and secondary ion mass spectrometry.
According to scientists, the Earth is a "cocktail" of all sorts of heterogeneous materials in the solar system. When our planet was still quite a "child", streams of meteorites fell on it, and about 4, 5 billion years ago, a tremendous catastrophe occurred - a collision with a giant celestial body the size of Mars, after which the Earth acquired its natural satellite - the Moon. It was during this period that zircon crystals formed during the cooling of the magma.