ultramafic rock

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Wikipedia English The Free Encyclopediaהורד מילון זה
Ultramafic rock
Ultramafic (or ultrabasic) rocks are igneous and meta-igneous rocks with very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are composed of usually greater than 90% mafic minerals (dark colored, high magnesium and iron content). The Earth's mantle is considered to be composed of ultramafic rocks.
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הגדר ultramafic rock

תרגם ultramafic rock





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