Dunite Rock Composition and Uses
Dunite is an ultramafic plutonic or intrusive igneous rock in which olivine exceeds 90% by volume. Ultramafic means it has
Pyroxenite Rock Composition and Formation
Pyroxenite is coarse-grained ultramafic, mostly plutonic rock. Ultramafic means they have at least 90% dark-colored minerals rich in iron and
What Are Felsic Magmas and Lavas
Felsic magmas and lavas are proportionately higher in lighter elements like oxygen, silicon, aluminum, sodium, or potassium and lower in
A Guide to Mafic Magmas and Lavas
Mafic magmas and lavas are the most common on Earth. The other relatively common ones are intermediate and felsic. Lesser