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Tiny 'Spherules' reveal details about Earth's asteroid impacts

By abe10tiger
Apr 26, 2012
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  1. Science News

    Tiny 'Spherules' Reveal Details About Earth's Asteroid Impacts

    Researchers are learning details about asteroid impacts going back to Earth's early history by using a new method for extracting precise information from tiny "spherules" embedded in layers of rock.

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    Researchers are learning details about asteroid impacts going back to the Earth's early history by using a new method for extracting precise information from tiny "spherules" embedded in layers of rock. The spherules were created when asteroids crashed into Earth, vaporizing rock that expanded as a giant vapor plume. Small droplets of molten rock in the plume condensed and solidified, falling back to the surface as a thin layer. This sample was found in Western Australia and formed 2.63 billion years ago in the aftermath of a large impact. (Credit: Oberlin College photo/Bruce M. Simonson)

    Source: Science Daily


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