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The metal detail which was recently found by Vladivostok resident is yet another discovery which perplexed the scientists. The coal in which the metal object was pressed was delivered to Primorye from Chernogorodskiy mines of Khakasia region. Knowing that the coal deposits of this region date 300 million years back, Russian experts inferred that the metal detail found in these deposits must be an age-mate of the coal.
When geologists broke the piece of coal in which the metal object was pressed into and spot-treated in with special chemical agents, it turned out that the metal detail was unusually light and soft. No more than seven centimeters long, the object was found to be composed of 98 percent aluminum and 2 percent magnesium. On the one hand, such an alloy stalled the scientists because nearly pure aluminum is very rarely found in nature. Thus, the detail was most definitely created artificially. On the other hand, however, when it became clear that the object was made from aluminum-magnesium alloy the experts quickly found an answer to the question of how a metal detail could withstand the ravages of time so well. The scientists explained that pure aluminum is increasingly prone to oxidization which contributes to the creation of a special layer protecting it from further corrosion. As a result, the metal detail made 98 percent from aluminum can endure not only high pressure but also heat and other severe natural conditions. : Voice of Russia