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Meteorites That Made Earth Are Of Many Types, Geochemists Report

By: Clara Moskowitz Published: 03/01/2012 02:31 PM EST on SPACEformation, the researchers calculated that a mix of three types of meteorite ingredients
could have produced the right blend of oxygen, nickel, and
chromium isotopes previously measured in Earth samples, as well as their new findings about silicon isotopes in terrestrial and meteorite samples.
The results suggest that a mixture of chondrites, rather
than enstatite chondrites alone, probably combined to create the Earth.
"This is the first time that a different composition in http://piscataway4miler.com/ "So that's quite different from what has been observed before." The fact that the silicon isotope compositions measured were similar in both
the Earth and moon rock samples suggests that the material
that formed the moon must have mixed with the Earth's mantle before the moon formed so that both bodies hold the same signature. "That shBut the precise details of the process are still not well understood.The new findings were published in the March 2 issue of the journal Science.

You can follow SPACE.com assistant managing editor Clara Moskowitz on Twitter @ClaraMoskowitz.

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