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by David Entwistle » Fri Mar 27, 2015 6:25 pm
A very nice report from
Smithsonian Science News.
Beautiful meteorites hold clues to solar system’s violent start
What was happening (geologically speaking) on Earth way back when it was a mere babe and being showered with meteorites? Until a time machine is invented, it might be hard to tell….that is, unless you’re Cari Corrigan, geologist at the Smithsonian’s National Museum of Natural History.
To get a better picture of how Earth’s nascent rocky surface reacted each time it was hit, Corrigan turns to a 4.5 billion-year-old kaleidoscope of elements known as a ureilite (YUR-a-lite) meteorite. Ureilites are made up of olivine and pyroxene (elements containing different levels of magnesium and iron), and carbon―all things also found on Earth ...
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David Entwistle
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