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Ancient Asteroid Destroyer Finally Found - New Kind of Meteorite
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Ancient Asteroid Destroyer Finally Found - New Kind of Meteorite

Source: livescience.com
For 50 years, scientists have wondered what annihilated the ancestor of L-chondrites, the roof-smashing, head-bonking meteorites that frequently pummel Earth.

Now, a new kind of meteorite discovered in a southern Sweden limestone quarry may finally solve the mystery, scientists report. The strange new rock may be the missing "other half" from one of the biggest interstellar collisions in a billion years.

"Something we didn’t really know about before was flying around and crashed into the L-chondrites," said study co-author Gary Huss of the University of Hawaii at Manoa.

The space rock is a 470-million-year-old fossil meteorite first spotted three years ago by workers at Sweden’s Thorsberg quarry, where stonecutters have an expert eye for extraterrestrial objects. Quarriers have plucked 101 fossil meteorites from the pit’s ancient pink limestone in the last two decades.

Researchers have nicknamed the new meteorite the "mysterious object" until its formal name is approved, said lead study author Birger Schmitz, of Lund University in Sweden and Chicago’s Field Museum. It will likely be named for a nearby church, the Österplana, he said.

Mysterious find

Geochemically, the meteorite falls into a class called the primitive achondrites, and most resembles a rare group of achondrites called the winonaites. But small differences in certain elements in its chromite grains set the mysterious object apart from the winonaites, and its texture and exposure age distinguish the new meteorite from the other 49,000 or so meteorites found so far on Earth.

"It’s a very, very strange and unusual find," Schmitz told Live Science’s Our Amazing Planet.

[...]

Read the full article at: livescience.com



READ: Ancient Asteroid Boiled Oceans, Burned the Sky, and Shook Earth for a Half-Hour

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