Assertion: basaltic magma | /r/MadeOf | magnesium
Facets:
Source sentences:
text: Mafic magmas are low in silica and contain more dark, magnesium and iron rich mafic minerals, such as olivine and pyroxene.
text: Mafic magmas are low in silica and contain more dark, magnesium and iron rich mafic minerals, such as olivine and pyroxene.