What is the name of an aphanitic rock consisting of 50% pyroxene, 20% plagioclase feldspar, 20% olivine and 10% hornblende?
A) Andesite
B) Basalt
C) Gabbro
D) Diorite
E) Granite

Question

Quizplus · Accepted Answer

Basalt is an aphanitic (fine-grained) igneous rock composed mainly of pyroxene and plagioclase along with other minerals such as olivine and hornblende. The composition described fits basalt, which is typically dark-colored and forms from the rapid cooling of lava at the Earth's surface.

What Is the Name of an Aphanitic Rock Consisting of 50