Mafic is rich in heavy minerals like magnesium and ferric, or iron. But Felsic is rich in silica and aluminium. Felsic is also rich in low-density minerals like oxygen, sodium and potassium. Thus, these rocks have low density unlike mafic rock, which have high density are heavy.
- What is the difference between felsic and mafic rocks?
- What is mafic and felsic?
- What is mafic mean?
- Does mafic or felsic cool faster?
- What are three main differences between felsic and mafic rocks?
- Is pumice felsic or mafic or intermediate?
- Is Augite mafic or felsic?
- Is Granite felsic or mafic?
- Is mafic or felsic more explosive?
- Is granite a mafic?
- Is diorite a mafic?
- How is mafic formed?
What is the difference between felsic and mafic rocks?
Chemically, mafic rocks are enriched in iron, magnesium and calcium and typically dark in color. In contrast, the felsic rocks are typically light in color and enriched in aluminium and silicon along with potassium and sodium. The mafic rocks also typically have a higher density than felsic rocks.
What is mafic and felsic?
In geology, felsic is an adjective describing igneous rocks that are relatively rich in elements that form feldspar and quartz. It is contrasted with mafic rocks, which are relatively richer in magnesium and iron. ... Felsic rocks are usually light in color and have specific gravities less than 3.
What is mafic mean?
: of, relating to, or being a group of usually dark-colored minerals rich in magnesium and iron.
Does mafic or felsic cool faster?
Felsic magmas tend to be cooler than mafic magmas when crystallization begins (because they don't have to be as hot to remain liquid), and so they may start out crystallizing pyroxene (not olivine) and plagioclase.
What are three main differences between felsic and mafic rocks?
Comparison Table Between Mafic and Felsic
Parameters of Comparison | Mafic | Felsic |
---|---|---|
Density | High density and heavy | Low density and lightweight |
Colour | Dark shades of green, or black | Light-coloured |
Mineral Content | Rich in magnesium and iron | Rich in aluminium and silica |
Silica Level | 45-55% | 70-85% |
Is pumice felsic or mafic or intermediate?
Classification of Igneous Rocks
TEXTURE | Felsic | Mafic |
---|---|---|
Phaneritic | Granite | Gabbro |
Aphanitic | Rhyolite | Basalt |
Vesicular | Pumice | Scoria |
Glassy | Obsidian |
Is Augite mafic or felsic?
Augite is an essential mineral in mafic igneous rocks; for example, gabbro and basalt and common in ultramafic rocks. It also occurs in relatively high-temperature metamorphic rocks such as mafic granulite and metamorphosed iron formations.
Is Granite felsic or mafic?
Igneous Rocks by Composition
Coarse-Grained Textures | Fine-Grained Textures |
---|---|
Peridotite = Ultramafic | Komatiite (Ultramafic, but too rare to worry about at this point in your life) |
Gabbro = Mafic | Basalt = Mafic |
Diorite = Intermediate | Andesite = Intermediate |
Granite = Felsic | Rhyolite = Felsic |
Is mafic or felsic more explosive?
In general, the more felsic the magma the greater the volatile content. So mafic/basaltic volcanoes are fairly quiescent, intermediate/andesitic volcanic eruptions are moderately explosive, and felsic/rhyolitic volcanoes may be extremely explosive. ... Their high volatile content makes them potentially highly explosive.
Is granite a mafic?
Granite and rhyolite are considered felsic, while basalt and gabbro are mafic (click here for more information on mafic and felsic). ... In the same respect, granite is the cooled (and exposed) magma chamber for extrusive rhyolite.
Is diorite a mafic?
Diorite is a plutonic igneous rock with intermediate composition between mafic and felsic rocks. It is visibly crystalline and usually has a granular texture (composed of roughly equally sized crystals) although the appearance may vary widely. Its volcanic (fine-grained) analogue is andesite.
How is mafic formed?
Mafic minerals crystallize at higher temperatures, which Bowen's Reaction Series describes. Therefore, rocks composed of mafic minerals are formed at higher temperatures. They are found in locations deep within the earth and also in tectonic spreading environments, like the seafloor.