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It affects the color.
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∙ 12y ago
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How can igneous rocks be different densities?
Igneous rocks vary greatly in composition and method of formation, resulting in diverse densities.
Why do igneous rocks that have the same composition sometimes have different sizes of mineral grains?
This is as a result of difference in the rate of cooling of the Igneous rocks.
Can igneous rock be felsic?
Yes. Felsic is a term used to describe the composition of some igneous rocks.
How do you classify igneous rocks?
Look at them. There shape, size, color and feel! Dont worry you will figure it out....
What are the 2 major factors that dictate the appearance of igneous rocks?
Its composition and how fast it cools from magma.
What can you conclude from the color of igneous rocks?
Their origin, and chemical composition.
What are the chemical formula of the igneous rock?
Rocks are mixtures and so do not have chemical formulas. Igneous rocks vary in composition, so there is no way of giving a formula.
What causes igneous rocks to get darker?
Chemical composition. Especially when Basic\Mafic.
What igneous rocks have a mineral composition between that of granitic and basaltic rocks?
Andesitic igneous rock.
Are rocks a chemical makeup?
Yes, the composition of the rocks is as a result of the distinct chemical composition.
How can igneous rocks be different densities?
Igneous rocks vary greatly in composition and method of formation, resulting in diverse densities.
Definition for andesitic composition?
the composition of igneous rocks lying between felsic and mafic.
How do we classify rocks as igneous and sedimentary and metamorphic?
composition, how it is formed
Igneous rocks are classified based upon their composition and what?
texture
Why do igneous rocks that have the same composition sometimes have different sizes of mineral grains?
This is as a result of difference in the rate of cooling of the Igneous rocks.
What rock does magma form when it cools?
Magma forms coarse crystalline intrusive igneous rocks such as granite or gabbro, depending on the chemical composition of the magma.
Two rocks that have the same general chemical and mineral composition?
According to the New York State Earth Science Reference Tables, the two rocks that have the same general chemical and mineral compositions are igneous rocks called andesite and diorite. They both have a composition that consists of quartz, plagioclase feldspar, biotite, pyroxene, and amphibole.
