Answered
In Geology
What rocks are mafic?
Mafic is a chemical classification for igneous rocks containing 46-85% mafic (minerals rich in iron and magnesium) minerals. Some examples include gabbro, basalt, and scoria.
Results for: Mafic
Answered
Why are mafic rocks dark?
They are dark due to their composition. They contain iron and magnesium which make them mafic. On the other hand, felsic rocks(opposite of mafic) contain silicon and aluminum.… (MORE)
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Are igneous rocks mafic or felsic?
They can be either. Mafic and felsic are categories used to classify igneous rocks based on composition. Other categories in this system are intermediate and ultramafic.
Answered
In Volcanoes
How are mafic and felsic rocks different?
Felsic rocks are high in silicon (Si) and low in magnesium (Mg) and in iron (Fe). Gradation in feldspar causes felsic rocks to be richer in potassium (K). Mafic rocks are hig…h in magnesium (Mg) and iron (Fe) and low in silicon (Si). Gradation in feldspar causes magic rocks to be richer in calcium (Ca) (MORE)
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Is marble felsic or mafic?
Neither. The terms mafic and felsic refer to the composition of igneous rocks, which are dominated by silicate minerals. Marble is a metamorphic rock composed of carbonate… minerals. The terms mafic and felsic do no apply to it. (MORE)
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In Volcanoes
Is pegmatite felsic or mafic?
It is felsic because it is lightly colored. Most rocks that are light are also felsic. The exception is obsidian which is dark and felsic.
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In Uncategorized
Is rock salt felsic or mafic?
Neither. The terms mafic and felsic refer to the composition of igneous rocks, which are dominated by silicate minerals. Rock salt is a sedimentary halide rock. Such terms… do not apply to it. (MORE)
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Is a limestone mafic?
No. The terms mafic and felsic apply to igneous rocks. Limestone is a sedimentary/biochemical rock and so cannot be said to be mafic, felsic, or intermediate.
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In Volcanoes
Is volcanic ash felsic or mafic?
Volcanic ash can be mafic, felsic, or intermediate. However, it is more often felsic than mafic.
Answered
In Volcanoes
Can a volcano both be mafic and felsic?
Yes. Many stratovolcanoes vary in the composition of what they erupt over time. They may cycle in the type of material. As the magma chamber cools, the magma somtimes beco…mes more felsic only to periodically receive and injection of fresh mafic magma from the mantle. (MORE)