Ultrapotassic igneous rocks are a class of rare, volumetrically minor, generally ultramafic or mafic silica-depleted igneous rocks. While there are debates...

metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in...

Magnesium-rich igneous rock Lamproite – Mantle rock expulsed to the surface in volcanic pipes Lamprophyre – Ultrapotassic igneous rocks – An ultramafic...

enriched in Fe and Mg, such as carbonatites and ultrapotassic igneous rocks. Intrusive ultramafic rocks are often found in large, layered ultramafic intrusions...

content of the igneous rock. Several igneous associations are noted: high-alumina basalts, ultrapotassic igneous rocks, and ultramafic rocks. The basaltic...

(lamprós) 'bright' and φύρω (phúrō) 'to mix') are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks,...

rules. Kimberlite – Igneous rock which sometimes contains diamonds Lamprophyre – Ultrapotassic igneous rocks Ultrapotassic igneous rocks – Class of rare ultramafic...

Ultrapotassic igneous rocks Nepheline syenite – Holocrystalline plutonic rock Ultrapotassic igneous rocks – Class of rare ultramafic or mafic igneous...

mineral in ultrapotassic igneous rocks such as kimberlites, carbonatites, and lamprophyre, owing to the unusual magma genesis of these rocks.[citation...

rocks particularly rich in either sodium or potassium—as are ultrapotassic igneous rocks. Albert Johannsen, A Descriptive Petrography of the Igneous Rocks...