'Microdiamonds' discovered at French winery point to ancient meteor crater below the vines

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'Microdiamonds' discovered at French winery point to ancient meteor crater below the vines
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A vineyard sits within an old impact crater in southern France, new research reveals.

A circular depression that holds a vineyard in a French winery is actually an old impact crater, new research finds.

Now, a new examination of the site reveals that there is indeed a magnetic anomaly within the crater. What's more, fragments of rock in and around the depression show signs of being subjected to a hard shock: There are pockets of melted and resolidified rock, as well as microdiamonds that form under great pressure, researchers will report at the 54th Lunar and Planetary Science Conference in The Woodlands, Texas, in mid-March.

"Such microspheres form either through abrasion of the meteorite in the atmosphere or only upon impact, when a large part of the iron meteorite melts and then reacts with the oxygen in the air," Brenker said in a statement . These spherules contained microscopic flecks of diamond, which form only under high pressure.

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