Results for: Mafic

What is Mafic like?

Mafic is a silicate mineral or rock that is rich in magnesium and  iron, and is usually dark in color. It is formed from cooling  volcanic lava.
In Geology

What is mafic and felsic lava?

  Felsic lava has a higher silica content than mafic lava. Felsic lava is slower moving (high viscosity) than the less viscous mafic lava. Mafic lava is higher in dark m (MORE)
In Geology

What is a mafic rock?

A Mafic rock is a type of igneous rock that is rich in Iron and Magnesium instead of silica. The rocks are also darker in color like Basalt.
In Geology

What are mafic rocks?

A mafic rock is composed of mafic minerals such as biotite mica, amphibole, proxene, and olivine. The actual word mafic refers to magnesium and iron; nevertheless, these miner (MORE)
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.
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In Geology

Is quartz mafic?

No, we call something mafic if it has a relative low silica content. As quartz is 100% silica, it's not mafic, but felsic.
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Is a limestone mafic or felsic?

Neither. 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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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 (MORE)

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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