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Some felsic rocks are and some are not. The term felsic is a description of an ingeous rock's composition, not its texture or where it occurs.
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What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
What are the main magma rocks?
The main magma rocks are basalt, andesite, and rhyolite. Basalt is mafic and extrusive, andesite is intermediate in composition and extrusive, and rhyolite is felsic and extrusive.
If granite within earth melts and then erupts at the surface what type of extrusive rock is likely to form?
A felsic extrusive igneous rock, such as rhyolite or obsidian.
What kind of rock andesite?
No. Andesite is classed as an 'intermediate' rock, being halfway in composition between a mafic and felsic rock. Mafic rocks are those that contain alot of ferromagnesian minerals (iron and magnesium) which give mafic rocks their dark colouring. Typical ferromagnesian minerals include olivine and pyroxene. Typical mafic rocks are basalt and gabbro. Felsic rocks, on the other hand, are low in magnesium and iron and are usually light in colour, such as granite and rhyolite. Andesite therefore typically contains a mixture of both felsic and mafic minerals and is classed as 'intermediate'.
Is felsic an intrusive or extrusive igneous rock?
It can be either. "Felsic" is not a specific type of rock but a general description of an ingeous rock's composition indicating high levels of silica and alkali feldspars.
Is Felsic a Intrusive or Extrusive Rock?
It can be either. The term felsic describes the composition of the rock, not where it forms. The general category for intrusive felsic rock is granite while extrusive felsic rock is rhyolite.
What are the types of volcanic rocks?
Igneous rocks exhibit three types of textures: coarse grained (intrusive), fine grained (extrusive), and porphyritic (two-stage solidification of mineral constituents). Chemically, they are categorized as felsic, mafic, or intermediate.
What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Are felsic rocks usually intrusive or extrusive?
Most felsic rocks, though not all, are intrusive.
Is Rhyolite Porphyry an intrusive or extrusive rock?
Rhyolite is a felsic volcanic rock.
How is rhyolite categorized?
Rhyolite is a felsic extrusive igneous rock.
Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture which is?
Recognized by a porphyritic texture, where large crystals (phenocrysts) are embedded in a fine-grained matrix. This indicates that the rock underwent two stages of cooling, with the phenocrysts forming during the slow cooling in the intrusive stage, followed by rapid cooling during the extrusive stage to form the fine-grained matrix.
3 main groups of igneous rocks?
The three main groups of igneous rocks are intrusive (plutonic), extrusive (volcanic), and hypabyssal rocks. Intrusive rocks form below the Earth's surface from the slow cooling of magma. Extrusive rocks form on the Earth's surface from rapidly cooling lava. Hypabyssal rocks are intermediate rocks that form from magma that solidifies in the crust.
What is the classification of rhyolite?
Rhyolite is classified as an extrusive igneous rock with a fine-grained texture. It is light in color and has high silica content, giving it a high viscosity compared to other volcanic rocks.
What are the 3 types of rock are in volcanoes?
Igneous rocks exhibit three types of textures: coarse grained (intrusive), fine grained (extrusive), and porphyritic (two-stage solidification of mineral constituents). Chemically, they are categorized as felsic, mafic, or intermediate.
If granite within earth melts and then erupts at the surface what type of extrusive rock is likely to form?
A felsic extrusive igneous rock, such as rhyolite or obsidian.
If granite within the earth melts then erupts at the surface what type of extrusive rock is likely form?
A felsic extrusive igneous rock, such as rhyolite or obsidian.
