New meteorite gives clues to origins of Earth impactors

[Hils]

"The space rock is a 470-million-year-old fossil meteorite first spotted
three years ago by workers at Sweden's Thorsberg quarry [...] its
texture and exposure age distinguish the new meteorite from the other
49,000 or so meteorites found so far on Earth."

http://www.livescience.com/46563-new-meteorite-type-fossil-ordovician.html

Open access article:

http://www.sciencedirect.com/science/article/pii/S0012821X14003367