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What is the density of a igneous rock when the rock beocmes more felsic?
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What are the common minerals in ignous rock?
Igneous Rocks have many different mineral compositions.---- * Felsic-High in silica,low density,light colored* Mafic-less silica than felsic,dark colored,higher density than felsic * Ultramafic-lowest content of silica
Are basaltic igneous rocks lower in density than granitic rocks?
Granite is very much less dense than basalt. This is why the continental crust (mostly composed of granite) floats on Oceanic crust (made mostly of basalt). Granite is 70 % silicon. Where basalt is mainly pyroxene.
Is granite a glassy igneous rock?
Granite is not metamorphic, but an intrusive igneous rock formed from cooling magma.
Are pyroclastic flows felsic or mafic?
Pyroclastic flows can be of any composition, but are more commonly felsic or intermediate.
How do light colored rocks and dark colored rocks differ in composition?
Light colored igneous rock is called felsic, and is high in quartz, muscovite mica, and orthoclase feldsparcontent. Dark colored igneous rock is called mafic, and contains a lesser amount of silica along with olivine, pyroxene, amphibole, biotite mica, and plagioclase feldspar.
As compared to mafic igneous rocks do all felsic igneous rocks cool and solidify more slowly?
No. Whether igneous rocks cool quickly or slowly is more dependent on whether the rock is intrusive or extrusive than whether it is mafic or felsic. Because it is so viscous it is often difficult for felsic magma to erupt, and so it is more likely to be intrusive and thus cool slowly. When felsic magma is involved in an eruption, it often erupts explosively. Some of the molten rock ejected cools extremely rapidly, forming volcanic glass.
What is the difference in density in mafic rocks in relation to felsic rocks?
Mafic rocks, such as those found in the oceanic crust, are more dense than the felsic rocks found in the continental crust.
What are the common minerals in ignous rock?
Igneous Rocks have many different mineral compositions.---- * Felsic-High in silica,low density,light colored* Mafic-less silica than felsic,dark colored,higher density than felsic * Ultramafic-lowest content of silica
What is a naturally occurring igneous rock more correctly called obsidian?
Obsidian is also called volcanic glass, an extrusive, largely non-crystalline, felsic igneous rock. Pumice is also a frothy form of obsidian.
What has a more felsic composition rhyolite or basalt?
Rhyolite has a more felsic composition than basalt.
What does the bowen's series depict?
Bowen's reaction series shows that one homogeneous body of magma can form more than kind of igneous rock. At its lowest temperature, it can form felsic igneous rock like Potassium Feldspar, muscovite, quartz or emerald. At its highest temperature, it can form mafic igneous rocks like olivine.
Are basaltic igneous rocks lower in density than granitic rocks?
Granite is very much less dense than basalt. This is why the continental crust (mostly composed of granite) floats on Oceanic crust (made mostly of basalt). Granite is 70 % silicon. Where basalt is mainly pyroxene.
Is granite a glassy igneous rock?
Granite is not metamorphic, but an intrusive igneous rock formed from cooling magma.
Are pyroclastic flows felsic or mafic?
Pyroclastic flows can be of any composition, but are more commonly felsic or intermediate.
How do light colored rocks and dark colored rocks differ in composition?
Light colored igneous rock is called felsic, and is high in quartz, muscovite mica, and orthoclase feldsparcontent. Dark colored igneous rock is called mafic, and contains a lesser amount of silica along with olivine, pyroxene, amphibole, biotite mica, and plagioclase feldspar.
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.
What are two types of sedimentary rocks?
Sedimentary and igneous are types of rock (the other type is metamorphic). Sedimentary rocks are quite soft, and include chalk and limestone. Igneous rocks include granite and basalt. They are formed when magma cools.
