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BASALT
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∙ 11y ago
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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.
What two components are responsible for the dark color of mafic rock?
== Silicon and oxygen.
Why are mafic minerals dark in color?
No. Felsic rocks are light-colored and high in silica. Mafic rocks are generally dark-colored and low in silica.
Igneous rocks like gabbro and basalt are silica-deficient with high magnesium and iron?
Yes, this is true. The rocks in question are 'Mafic' or 'Basic'. Mafic minerals are often dark in colour, and are indeed composed of Iron, with a good portion of Magnesium and other elements. They are Silica/Quartz deficient, and also note that the mineralogy makes Basaltic lava particularly runny, as opposed to Andesitic lava, with high Silica, which is very viscous.
What is a dark colored low silica rock?
Mafic igneous rocks, like basalt, are dark colored and low in silica.
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.
What is the explanation for the difference between texture and composition?
Texture is the physical description of the rock. I always think of this as the property you can figure out with your eyes closed (how does the rock "feel"?). Texture types included coarse-grained, fine-grained, glassy, etc. Composition is the chemical description of the rock, what minerals it is made of. For igneous rocks the terms used are felsic (high in silica, usually light colored) to mafic (low in silica, high in iron and magnesium, usually dark colored).
What is the igneous rock that is dense and dark colored and forms from magma that is rich in iron and magnesium but poor in silica That has 8 letters?
basaltic
What two components are responsible for the dark color of mafic rock?
== Silicon and oxygen.
What are dark colored often extrusive igneous rocks containing iron magnesium or calcium?
They are referred to as mafic, a word representing their magnesium and iron content.
Why are mafic minerals dark in color?
No. Felsic rocks are light-colored and high in silica. Mafic rocks are generally dark-colored and low in silica.
Igneous rocks like gabbro and basalt are silica-deficient with high magnesium and iron?
Yes, this is true. The rocks in question are 'Mafic' or 'Basic'. Mafic minerals are often dark in colour, and are indeed composed of Iron, with a good portion of Magnesium and other elements. They are Silica/Quartz deficient, and also note that the mineralogy makes Basaltic lava particularly runny, as opposed to Andesitic lava, with high Silica, which is very viscous.
What is a dark colored low silica rock?
Mafic igneous rocks, like basalt, are dark colored and low in silica.
What is a dark-colored low silica rock?
Mafic igneous rocks, like basalt, are dark colored and low in silica.
Where do we find intermediate rocks?
Intermediate rocks contain roughly equal amounts of dark- and light-colored minerals. Igneous rock containing 56-65 percent silica.
What is a mafic rock and what color is it?
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.
Is and igneous rock low in silica dark colored or light colored?
Generally, igneous rocks that are low in silica are dark relative to those that are high in silica. This tendency is largely the result of rocks low in silica having increased iron. Iron minerals tend to adsorb significant amounts of the visible spectrum and hence appear dark. I want to emphasize that this is a general tendency and there are exeptions -- obsidian which is very high in silica is typically a dark to black rock and a special igneous rock call carbonatite is very light in color but has little silica.
