出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/05/18 20:01 UTC 版)
Komatiite (pronounced /koʊˈmɑːtɪ.aɪt/) 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.