Granite, a course-grained, felsic intrusive igneous rock is most similar in mineral composition to __________ , which is a fine-grained, felsic extrusive equivalent.
A)andesite
B)basalt
C)gabbro
D)rhyolite

Question

Quizplus · Accepted Answer

Granite is a course-grained, felsic intrusive igneous rock that is composed of minerals such as quartz, feldspar, and biotite. Rhyolite, which is a fine-grained, felsic extrusive equivalent, also has the same mineral composition of quartz, feldspar, and biotite, but is formed from lava instead of magma. Andesite (A) and basalt (B) are both mafic extrusive igneous rocks, which have a very different mineral composition than granite. Gabbro (C) is a course-grained, mafic intrusive igneous rock that has a different mineral composition than granite.

Granite, a Course-Grained, Felsic Intrusive Igneous Rock Is Most Similar