Which phaneritic, igneous rock is comprised mainly of olivine, pyroxene, and calcium rich plagioclase?
A)granite
B)rhyolite tuff
C)gabbro
D)basalt

Question

Quizplus · Accepted Answer

Gabbro is a phaneritic, igneous rock that is composed mainly of olivine, pyroxene, and calcium-rich plagioclase. Granite is a felsic (light-colored) rock that typically contains quartz, feldspar, and mica. Rhyolite tuff is a volcanic rock made up of layers of fragmented volcanic ash and pumice. Basalt is a mafic (dark-colored) igneous rock composed mainly of pyroxene and plagioclase, but not typically olivine.

Which Phaneritic, Igneous Rock Is Comprised Mainly of Olivine, Pyroxene