The minerals discovered in a 33,400-pound meteorite offer an exciting peek into the collisions that rocked our early solar system
, a former curator at the Field Museum of Natural History in Chicago who had postulated the existence of the mineral that now bears his name.Our planet has roughly 5,800 minerals, while only about 480 have been found in meteorites. Many of those meteoritic minerals are truly alien—some 30 percent don't form naturally on Earth.
As the molten metal of a meteorite slowly cools and solidifies, different minerals crystallize at different times, which leaves behind certain"incompatible" elements that concentrate in the dwindling pool of liquid. The new minerals formed when almost all the metal had already cooled and just tiny molten blobs remained, eventually crystallizing to form the inclusions.
These colliding bodies may have been the cores of destroyed asteroids, or perhaps they were primitive space rocks known as chondrites, which have a significant amount of metal mixed with rock. Either way, they likely smashed together at stunning speeds—these collisions happen in the asteroid belt today with objects speeding faster than 11,000 mph.
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