Explain how the silica content of molten material affects the color of igneous rocks?

Answer 1

Silica in molten material tends to crystallise as quartz, which is white or mostly pale in colour. So felsic rocks (from silica-rich magma) tend to be pale, while mafic rocks (from silica-poor magma) tend to be dark in colour.

Answer 2

Igneous rocks high in silicate content are generally lighter in color than are the mafic (low in silicate) rocks.

Answer 3

-The magma that is high in silica usually forms light-colored rocks such as granite.

-the lava that is low in silica usually forms in dark-colored rocks such as basalt.

Answer 4

The majority of minerals associated with igneous rocks are silicates. It is the proportion of certain silicate minerals that affects the color of igneous rocks. Igneous rocks that are high in orthoclase feldspar, quartz, and muscovite mica will be lighter in color than igneous rocks that are higher in olivine, pyroxene, amphibole, and biotite mica.

Answer 5

The silica content of molten material influences the color of igneous rocks by affecting the mineral composition that forms as the rock cools. Rocks with higher silica content, such as granite, tend to be lighter in color due to the presence of light-colored minerals like quartz and feldspar. On the other hand, rocks with lower silica content, like basalt, are typically darker in color because they contain minerals like olivine and pyroxene.

Answer 6

Igneous rocks high in silicate content are generally lighter in color than are the mafic (low in silicate) rocks.

Answer 7

The more silica contained in a rock, the lighter in color it will be.

Answer 8

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