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What happens if the percentage of felsic minerals in a rock increase?
Wiki User
∙ 11y ago
it becomes darker and density will decrease (a)
Wiki User
∙ 11y ago
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What rocks are felsic?
Felsic rock are igneous rocks that are rich of quartz, orthoclase and plagioclase minerals. Here is the list of felsic rocks: granites, rhyolites, aplites, and pegmatites.
Is sandstone felsic or mafic?
Neither. The terms mafic and felsic refer to the composition of igneous rocks, which are dominated by silicate minerals. Marble is a metamorphic rock composed of carbonate minerals. The terms mafic and felsic do no apply to it.
What minerals are present in felsic rocks and mafic rocks?
Felsic refers to igneous rocks that are relatively high in silica and aluminum. Mafic refers to igneous rocks that are higher in magnesium and iron than felsic rocks.
Why is the main reason that oceanic crust is heavier than continental crust?
Oceanic crust is mafic in composition and continental crust is felsic in composition. Mafic minerals generally have a higher density than felsic minerals and therefore, the oceanic crust is heavier.
Which pair of minerals is most likely to be found in felsic rock?
the most common is granite and rhyolite
What rocks are felsic?
Felsic rock are igneous rocks that are rich of quartz, orthoclase and plagioclase minerals. Here is the list of felsic rocks: granites, rhyolites, aplites, and pegmatites.
What is the comaprison of felsic and mafic?
Felsic minerals are Silicon-rich; whereas Mafic ones are low in Silicon, but contain Iron and Magnesium.
Is sandstone felsic or mafic?
Neither. The terms mafic and felsic refer to the composition of igneous rocks, which are dominated by silicate minerals. Marble is a metamorphic rock composed of carbonate minerals. The terms mafic and felsic do no apply to it.
What minerals are present in felsic rocks and mafic rocks?
Felsic refers to igneous rocks that are relatively high in silica and aluminum. Mafic refers to igneous rocks that are higher in magnesium and iron than felsic rocks.
How does fractional crystallization lead to magmatic differentiation?
As a magma crystallizes it undergoes fractional crystallization in which mafic minerals crystallize first and felsic minerals crystallize last. Therefore, as fractional crystallization occurs the magma becomes increasingly less mafic and increasingly more felsic. The viscosity also increases as a magma becomes more felsic.
Why is the main reason that oceanic crust is heavier than continental crust?
Oceanic crust is mafic in composition and continental crust is felsic in composition. Mafic minerals generally have a higher density than felsic minerals and therefore, the oceanic crust is heavier.
What is lighter gabbro or granite?
Granite is lighter because its composed of felsic minerals while gabbro is made up of dark ferromagnesian minerals.
Which minerals is rarely found in felsic igneous rocks?
they are found in approximetily 90 %in the earth crust
What are the similarities between a felsic magma andmafic magma?
Both consist of molten rock and minerals
Which pair of minerals is most likely to be found in felsic rock?
the most common is granite and rhyolite
Why are mafic rocks denser than felsic rocks?
Mafic rocks are denser than felsic rocks because they contain heavier compounds, minerals and other materials, they are ferromagnesian in composition.
Mafic minerals are often found near the bottom of a pluton and felsic minerals near the top what process is this because of?
The process is painful love. When the mafic minerals fall in love with the felsic minerals they fall to the bottom. The felsic is often there too and sees the minerals falling toward them so they scared to be in love again and go to the top. This makes the mafic mad and it stays there. The felsic is afraid to go back and stays on the top. :( <333 love hurts If I remember my geology, plutons are considered intrusions, and reflect the mineral composition of the magma they were formed from. That being said, what minerals are present in a pluton are directly a result of what they were made from, and the minerals condense out following Bowen's Reaction series. This means mafic minerals condense out at a higher temp and higher pressure, so as the pluton continues to intrude, it cools and depressurizes. Thus minerals lower in the reaction series cool and crystallize before the felsic minerals towards the top. You can also find contact metamorphic rocks on the edges of plutons. Some of these may wrongfully appear to be mafic rocks like Olivine. http://en.wikipedia.org/wiki/Bowen's_reaction_series
