How does Felsic magmas different from mafic magmas in color temperate minerals composition and the kind of rock each form?

Answer 1

Mafic lava is less viscous(runnier) than felsic lava due to a lower silica content. This causes non-violent eruptions such as in the Hawaiian Islands. Mafic lava tends to be associated more with interplate volcanism and mid-ocean ridges and produces the rock type known as basalt. (The ocean floor is made of basalt.) Felsic lava is mainly found at convergent zones (areas of colliding plates) and has a high silica and water content which causes the lava to be highly viscous and causes very violent eruptions. This lava produces rhyolite and andesitic rocks.

The color of the rocks formed by magmas is a consequence of its composition, mafic magmas are dark colored (Mg-Fe) and felsic magmas are light colored (Feldspars-Si).

Answer 2

The term mafic is derived from magnesium and the Latin word for iron, while felsic is derived from the words feldspar and silicone. Mafic rocks contain heavier elements and include basalt and gabbro. Felsic rocks have a lower percentage of heavier elements, and the most common type is granite.

Answer 3

Felsic rocks are greater than 65% silica and contain less of the heavy elements present in mafic rocks. Felsic rocks are generally lighter in color than mafic rocks. Intermediate rocks contain between 55 and 65% silica. Mafic is a term used to describe an igneous rock that contain between 45 and 55% silica, is usually dark in color, with a chemistry that may be high in magnesium and iron. Note that mafic, felsic, and intermediate rocks are not all completely the elements listed. They are made up of others, too.

Answer 4

Mafic lava is less viscous than felsic lava due to a lower Silica content . This causes non-violent eruptions such as in the Hawaiian Islands. Mafic lava tends to be associated more with interplate volcanism and mid-ocean ridges and produces the rock type known as basalt. Felsic lava is mainly found at convergent zones and has a high silica and water content which causes the lava to be highly viscous and causes very violent eruptions. This lava produces rhyolite and andesitic rocks.

Answer 5

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 high in magnesium (Mg) and iron (Fe) and low in silicon (Si). Gradation in feldspar causes magic rocks to be richer in calcium (Ca)

Answer 6

Felsic rocks are lighter in color and less dense than mafic rocks. They are dominate by quartz, potassium feldspar, and sodium-rich plagioclase. Mafic rocks are darker, denser, and contain primarily calcium-rich plagioclase, pyroxenes, and sometimes olivine.

Answer 7

Mafic or basic rocks are low in silica and oxygen whereas felsic or acidic rock is higher in silica and oxygen content.

Answer 8

Felsic rocks have lots of silica mafic rocks have very little silica