Stone, found a farmer of Missouri - a rare type of meteorite


16/11/2011

In 2006, a farmer from Missouri meteorite found on the slope of a hill, near the town of Conception Junction (population 202 people). But now scientists have been able to determine how valuable this discovery.

Beguiling geochemist Randy (Randy Korotev) from Washington University in St. Louis and his colleagues identified a stone flew in from outer space, as a rare type of pallasite. As the researchers note, the United States had previously been found only 19 samples of various pallasites. The meteorite has come a long way, before the fall into the hands Koroteva.

The researchers believe that this meteorite was once part of the asteroid that orbitiroval around the sun in the asteroid belt, located between Mars and Jupiter. At some point, this chip has shifted from orbit, and being captured by the gravitational force of the Earth, appeared on our planet. Scientists do not know exactly when the meteorite fell to Earth, but it was discovered in 2006, when the farmer, who wished to remain anonymous, came across a particularly heavy stone on the hillside near Conception Junction.

Externally, the stone looked like an ordinary stone, but when the farmer sawed off the edge of the stone, he found a beautiful and unusual structure inside it. Green crystals of the mineral, called olivine, nickel-iron pierced the thick like chocolate chips in cookies. This is the distinctive pallasite.

In 2009, Charles Eston (Karl Aston), a chemist at the University of St. Louis and a collector of meteorites, and had heard about the stone, united with friends, he decided to buy it. In order to determine exactly what type of stone, was in their hands, collectors brought him Korotevu, who is well known among enthusiasts who are interested in meteorites due to its web-site devoted to the identification of celestial debris.

"We would not be involved in the procedure of recognition of a meteorite from Conception Junction, if Carl did not find my site" - said in a statement whiling away. Scholar and collector of meteorites burning with impatience to conduct a study of stone and determine its type. Beguiling and his research team took a sample of stone and analyzed the basic composition of olivine crystals inside the rock for further classification. They found that it was a kind of stone belonging to the main group pallasite and similar to the majority of the 19 samples that were found in this country before.

But in order to ascertain whether this is part of the meteorite fragment known species that have been studied, or is a new kind of stone, scientists have been more research is needed. So, Court sent the stone to John Wasson (John Wasson) of the University of California at Los Angeles (USA), who had the special tools needed to analyze the metal matrix in which there were crystals.

And then Wasson said about the incredible discovery, saying that the stone was unique and had no relation to any of the pallasites that were previously discovered. This allowed for a meteor its own name. And 27 August 2011 by the Nomenclature Committee of the meteorite society officially named the meteorite stone Conception Junction, after the area where it is located.

It should be noted that the cost of even unremarkable meteorites is $ 03.02 per gram. Because of its rarity rock Conception Junction was estimated at $ 200 per gram. Since it weighs about 17 pounds, it will cost about $ 3.4 million. Most likely, this space rock cut into pieces, which then fall into various universities and museums.

Original: LiveScience Translation: M. Potter


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