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Which is a fine-grained igneous rock made up primarily of pyroxene and plagioclase feldspar? a. granite b. gabbro c. basalt d. rhyolite
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Which is a fine-grained igneous rock made up primarily of pyroxene and plagioclase feldspar?

a. granite
b. gabbro
c. basalt
d. rhyolite

User Derek Kite
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A. Basalt

Basalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene. The specimen shown is about two inches (five centimeters) across. Diorite is a coarse-grained, intrusive igneous rock that contains a mixture of feldspar, pyroxene, hornblende, and sometimes quartz.
User Danwild
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