An igneous [IG-nee-us] rock sample is characterized as being composed of crystals of olivine, calcium-rich plagioclase, and augite, and has a phaneritic [fan-er-IT-ik] texture. Which of the following four rocks is it?

W) Basalt [bah-SALT]

X) Andesite

Y) Gabbro

Z) Granite
Y) GABBRO