Composition of Phacoliths
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Answer:
Gabbros are dark-colored, coarse-grained intrusive igneous rocks. They are very similar to basalts in their mineral composition. They are composed mostly of the mineral plagioclase feldspar with smaller amounts of pyroxene and olivine. Obsidian is a very shiny natural volcanic glass.
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Explanation:
a phacolith is a Pluto of igneous rock parallel to the bending plane or foliation of folded country rocks
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