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No. First of all, the terms mafic and felsic generally only apply to igneous rock. even among igneous rocks, mafic and felsic are just ranges on a "spectrum" of composition. Other classifications and examples include ultramafic (peridotite), intermediate (andesite), and intermediate-felsic (dacite).
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Do extrusive rocks cool quickly?
Extrusive rocks do cool quickly because either the crystals in the rock are very small or there are no crystals at all.
What phase of matter are metamorphic rocks?
All rocks are in the solid phase of matter.
Are rocks dangerous?
Rocks are generally only dangerous if they fall on you, however, some rocks are poisonous. Asbestos, torbernite, and orpiment can all appear in rocks, making these rocks dangerous and potentially deadly.
Are all rocks minerals?
Rocks may be made of one type of mineral or a combination of several.
What else can sedimentary rocks form from?
All rocks can form from sedimentary because the rock cycle is endless.
What is the mafic mineral and felsic mineral?
First of all there is no such thing as a mafic or a felsic "mineral". There can be mafic and felsic rocks.Mafic rocks have a high magnesium and iron content.Felsic rocks enriched with lighter elements such as oxygen and silicon.
How does Felsic magmas different from mafic magmas in color temperate minerals composition and the kind of rock each form?
Mafic lava is less viscous(runnier) than felsic lava due to a lower silica content. This causes non-violent eruptions such as in the Hawaiian Islands. Mafic lava tends to be associated more with interplate volcanism and mid-ocean ridges and produces the rock type known as basalt. (The ocean floor is made of basalt.) Felsic lava is mainly found at convergent zones (areas of colliding plates) and has a high silica and water content which causes the lava to be highly viscous and causes very violent eruptions. This lava produces rhyolite and andesitic rocks. The color of the rocks formed by magmas is a consequence of its composition, mafic magmas are dark colored (Mg-Fe) and felsic magmas are light colored (Feldspars-Si).
Is Tuff mafic or felsic?
Pumice is more related to a textural feature, rather than a compositional attribute. For example, pumice originates when there are enough dissolved gases in the magma, such that when it is ejected from the volcano, the depressurization of the dissolved gases causes a rapid expansion as the gases exsolve (just like when you open a pop - the gases are initially under pressure, and you release that pressure by opening the can or bottle). The rapid change in temperature, from hundreds to thousands of degrees to the temperature of of the surrounding environment, causes a rapid cooling effect, whereby the expanding gases are frozen in place. These two factors are what give pumice its distinctive texture and ability to float when placed in water, as opposed to other volcanic rocks (such as scoria).Whether or not the pumice is felsic (light in color) or mafic (dark in color) depends on its chemical composition and therefore, pumice can be both felsic or mafic depending on its parental magma.General classification as to whether a rock is felsic or mafic is with regards to the silicate content of the rock as follows:felsic < 69% SiO2Intermediate Felsic 63 - 69% SiO2Intermediate 52- 63% SiO2Mafic < 52% SiO2Ultra Mafic < SiO2This said, felsic pumice (white or light tan brown colors) are more common to find than mafic pumice.
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 magma is rich in feldspars and silica?
no its the least silica rich of granitic and andesitic magma.
Are felsic rocks usually intrusive or extrusive?
Most felsic rocks, though not all, are intrusive.
What does the word felsic mean?
Feldspar can be a variety of colors: clear, gray, white, tan, pink, brown, or red.
Do all igneous rocks have the same mineral composition?
Certainly not: Igneous rocks vary in mineralogy from Felsic to Mafic, which encompassed all sorts of compositions. Does a Granite appear the same as a Basalt? No, because they have different mineralogies, and different minerals have different colours and textures. This is visible in every rock.
What are andesite rhyolite and trachyte all a type of?
They are all extrusive igneous (i.e. volcanic) rocks of intermediate to felsic composition.
What kind of rocks are found in Iceland?
Iceland is mostly composed of Basalt, but all rocks are 'Basic' or 'Mafic' as the whole island is a volcano. Basalt is an Igneous rock.
A type of intrusive igneous rock with larg crystals?
Basically, all intrusive igneous rocks have large crystals. Because they are intrusive, they take a long time to cool down, and so there is a lot of time for crystal growth. That said, the biggest categories of intrusive igneous rocks are: Peridotite (ultramafic) Gabbro (mafic) Diorite (Intermediate) Granite (silicic/felsic) Granite is the most common one in the continental crust.
What is the hardest of all the rocks?
Hardest Mineral=Diamond Second would be corundum.etc. etc....but these are minerals. Rocks are a combination of at least 2 minerals. A hard "rock" would be nearly any mafic, igneous rock.
