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Would you expect a light gray igneous rock to be rich or poor in silica?
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What are light colored often intrusive igneous rocks containing a high percentage of silica called?
They are called felsic igneous rocks.
What is a light colored rock that has high silica?
Felsic igneous rocks with alkali feldspars, quartz, and mica. Examples would include rhyolite, pumice, granite, and obsidian.
What is the difference between acidic and basic igneous rock?
Acidic igneous rocks are composed of high percentage of silicic materials (minerals) and are light in colour while the Basic igneous rocks are contains predominantly ferromagnesian minerals\materials, they have very little proportion of silica and are dark in colour.
Explain how the silica content of molten material affects the color of igneous rocks?
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.
What does the word felsic mean?
Feldspar can be a variety of colors: clear, gray, white, tan, pink, brown, or red.
What color will igneous rock with high levels of silica be?
An igneous rock with a high level of silica will have a light color.
A light colored igneous rock with silica content and explosive eruptions?
Andesite
What is A light colored igneous rock with high silica context explosive eruptions?
majority
What are light colored often intrusive igneous rocks containing a high percentage of silica called?
They are called felsic igneous rocks.
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.
What is light colored ofrten intrusive igneous rock containing a high percentage of silica are called?
felsic
What is a light colored rock that has high silica?
Felsic igneous rocks with alkali feldspars, quartz, and mica. Examples would include rhyolite, pumice, granite, and obsidian.
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 does the word felsic?
The word felsic is used to describe igneous rocks that are rich in silica and alkali feldspar. Such rocks tend to be light in color and have a lower density than other igneous rocks.
What is the difference between acidic and basic igneous rock?
Acidic igneous rocks are composed of high percentage of silicic materials (minerals) and are light in colour while the Basic igneous rocks are contains predominantly ferromagnesian minerals\materials, they have very little proportion of silica and are dark in colour.
What are igeous rocks that are light colored and have a lower density they form from thick stuff magma that contains lots of silica and lesser amounts of iron and magnesium?
Those igneous rocks would be referred to as felsic.
What is composition of acidic igneous rocks?
Acidic igneous rocks, also known as felsic rocks, are composed primarily of light-colored minerals such as quartz, feldspar, and mica. These rocks have a high silica content and typically have a lower iron and magnesium content compared to mafic rocks. Examples of acidic igneous rocks include granite and rhyolite.
