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Which rock is most felsic out of rhyolite andesite and basalt?
Of these Rhyolite has the highest silica content.
What is the difference between rhyolite and andesite?
They have different compositions. Most igneous rocks fall into a spectrum ranging from mafic (low silica, dominated by iron, magnesium, and calicum) to felsic (high silica, dominated by sodium and potassium) On this scale rhyolite is felsic while andesite is intermediate. Rhyolite is dominated by the presence of quartz, potassium feldspar, and sodium-rich plagioclase. Rhyolite also tends to contain more volcanic glass. Common colors of rhyolite are light gray, white, and pink. Andesite often contains plagioclase with a fiar balance of sodium and potassium. Plagioclase is also a common dominant mineral. Andesite is darker than rhyolite, ranging from gray to almost black.
Why does granite weather more slowly than rhyolite?
Because granite is harder; it is composed mostly of manganese and iron, it forms first in a lava flow, and it generally deeper underground. Rhyolite has a different chemical makeup; it has a significantly high silica content, making the rock lighter and more prone to the affects of mechanical weathering.
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.
Does rhyolite have a more mafic composition than basalt?
Rhyolite is not a mafic rock, but a felsic rock, high in silicates, and similar to granite in composition.
Is rhyolite silica rich or silica poor?
Rhyolite is felsic and thus silica rich.
What is the name of a volcanic rock with high silica content?
Rhyolite.
Is rhyolite a basaltic composition?
No. Basalt is a low-silica igneous rock while rhyolite is high-silica. As far as volcanic rocks go, they are essentially opposites.
Does rhyolite or basalt have more silica in it?
rhyolite
Is andiestic magma high in silica?
Andesitic magma has intermediate silica content. Rhyolite has the highest(>68%) and Basaltic the least.
Is rhyolite an polymerization sedimentary rock?
No, rhyolite is a silica-rich volcanic or igneous rock.
Which rock is most felsic out of rhyolite andesite and basalt?
Of these Rhyolite has the highest silica content.
Why is rhyolite felsic?
Rhyolite contains abundant silica and alkali feldspar, which are the the defining components of felsic rock.
What turns magma into rhyolite?
Rhyolite is a volcanic rock formed when highly viscous magma rich in silica erupts. In many cases rhyolite comes in the form of tuff, formed when the material is blasted out explosively, forming ash and pumice which eventually settle to the ground. Sometimes this tuff is so hot it gets welded into a solid rock. In other cases it erupts as lava. This lava will either form extremely thick lava flows or pile up on the vent as a lava dome.
How would you describe lava with a high viscosity?
The highest viscosity lava is rhyolite. Rhyolitic lava tends to form dome-shaped volcanoes and tends to cause explosive eruptions.
What is the difference between rhyolite and andesite?
They have different compositions. Most igneous rocks fall into a spectrum ranging from mafic (low silica, dominated by iron, magnesium, and calicum) to felsic (high silica, dominated by sodium and potassium) On this scale rhyolite is felsic while andesite is intermediate. Rhyolite is dominated by the presence of quartz, potassium feldspar, and sodium-rich plagioclase. Rhyolite also tends to contain more volcanic glass. Common colors of rhyolite are light gray, white, and pink. Andesite often contains plagioclase with a fiar balance of sodium and potassium. Plagioclase is also a common dominant mineral. Andesite is darker than rhyolite, ranging from gray to almost black.
What does high silica content magma form?
When it cools and crystallizes into rock, the rock will be described as felsic igneous rock. Examples of felsic igneous rocks are granite, rhyolite, and pumice.
