How Do Volcanic Rocks Differ in Composition
Volcanic Rocks and Plutonic Rocks Differ Mainly in That Volcanic Rocks Form at the Surface of a Planet Whereas Plutonic Rocks Form Beneath the Surface...
How Do Volcanic Rocks Differ In Composition?
Volcanic rocks and plutonic rocks differ mainly in that volcanic rocks form at the surface of a planet whereas plutonic rocks form beneath the surface. Plutonic rocks are also coarser grained, being made of large interlocking crystals whereas volcanic rocks are more fine-grained.
What is the composition of a volcanic rock?
Mineral Composition
A variety of minerals contribute to the composition of lava rocks. The most common minerals are pyroxine, olivine, amphibole and plagioclase feldspar, although low quantities of hornblende, biotite mica, magnetite and quartz are occasionally present.
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