An igneous rock that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals has a composition that is?

An igneous rock that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals is classified as a basaltic or mafic rock. This composition typically indicates a formation from a relatively high-temperature magma that is rich in iron and magnesium. The presence of plagioclase feldspar suggests a significant amount of sodium and calcium in the rock's mineral makeup. Overall, this rock type is commonly associated with volcanic activity and can be found in oceanic crust.