komatiites

Komatiite (pron.: /koʊˈmɑːtɪ.aɪt/)[1] is a type of ultramafic mantle-derived volcanic rock. Komatiites have low silicon, potassium and aluminium, and high to extremely high magnesium content. Komatiite was named for its type locality along the Komati River in South Africa.

For more information about komatiites check the Wikipedia article here

ZME Science posts about komatiites

Geochemical analysis show Earth never really melted

Mon, Feb 20, 2012

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Unexpected new findings from University of Maryland researchers show that a portion of our planet’s mantle survived Earth’s rough formation, including a collision with a planet-sized body which many believe led to the creation of the Moon, as we see it today. “It is believed that Earth grew to its current size by collisions of [...]

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