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Are iron rich igneous rocks denser or less dense than silica rich igneous rocks?
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In general how does the density of a light colored igneous rock differ from that of a dark colored igneous rock?
Light-coloured igneous rocks, such as granite, have a higher silica content and lower iron and magnesium than darker ones, such as basalt. Since iron and magnesium are very dense minerals, this makes darker igneous rocks more dense than lighter ones.
What rock in the igneous family are medium colored and have no silica?
Igneous rocks that are medium colored and have no silica are called mafic rocks. They are mainly composed of magnesium and iron.
What igneous rock family contains the highest proportion of silica?
Felsic igneous rock contains the highest proportion of silica. Granites are felsic igneous rocks.
Which igneous rock has the lowest silica content?
Felsic Rocks
How does silica content and viscosity effect igneous rocks?
As silica content increases viscosity increases.
Igneous rocks that are dense and dark colored they form from magma that is rich in iron and magnesium and poor in silica?
Igneous rocks that are dense and dark-colored are called basaltic rocks. They are formed from magma that is rich in iron and magnesium and poor in silica content.
In general how does the density of a light colored igneous rock differ from that of a dark colored igneous rock?
Light-coloured igneous rocks, such as granite, have a higher silica content and lower iron and magnesium than darker ones, such as basalt. Since iron and magnesium are very dense minerals, this makes darker igneous rocks more dense than lighter ones.
Are metamorphic rocks more dense than sedimentary or igneous rocks?
Igneous rocks are denser than sedimentary rocks because the particles and materials making up the igneous rock are more closely packed and compacted making more matter able to fit into a tiny area of its structures.
What rock in the igneous family are medium colored and have no silica?
Igneous rocks that are medium colored and have no silica are called mafic rocks. They are mainly composed of magnesium and iron.
What color will igneous rocks be if they are low in silica?
brown
What igneous rock family contains the highest proportion of silica?
Felsic igneous rock contains the highest proportion of silica. Granites are felsic igneous rocks.
Igneous rocks are classified based upon their what?
Igneous rocks can be classified by their method of formation and by their mineralogy.
What is the name of a silica rick igneous rock?
volcanic rocks
Which igneous rock has the lowest silica content?
Felsic Rocks
How does silica content and viscosity effect igneous rocks?
As silica content increases viscosity increases.
What are the terms felsic and mafic used by geologists to describe?
They are descriptive terms as to the relative silica content of igneous rocks. Igneous rock which is high in silica is referred to as felsic. Igneous rock which is relatively low in silica is referred to as mafic.
Is silica intrusive igneous igneous rocks?
Silica is a mineral occurring alone as quartz, flint & chert and some semi-precious stones; but it is a primary constituent of all igneous rocks irrespective of mode of formation & deposition.
