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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.
Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture which is?
porphyritic
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.
3 main groups of igneous rocks?
Felsic, mafic, and intermediate (by chemistry). Also intrusive, extrusive, and porphyritic (by method of formation and visible texture).
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?
porphyritic
What are some examples of igneous rocks?
Igneous rocks are generally classified first on the basis of their formation (and therefore their texture) as intrusive or extrusive. Intrusive rocks are solidified from magma under the surface resulting in a visible crystalline texture, and extrusive igneous rocks are solidified from lava at or near the surface, resulting in a small or nearly invisible crystalline texture.Igneous rock can additionally be classified by general chemistry composition as felsic, intermediate, mafic, and ultramafic. Felsic rocks are higher in silica and aluminum. Maficrocks are higher in magnesium and iron.Examples of igneous rock include:pumicebasaltandesitewehrlitemonzoniteanorthositewelded tuffnepheline syeniteaplitewebsteritekimberlitegabbrodioritegranitebasanitetroctolitepegmatitediabasepicritelatitegranodioritetonaliteperidotiteignimbritehornblenditelampophyrephonolitedunitesyenitetachylytemonzogranitetephritegranophyreboniniterhyodacitetrachytecarbonatiteharzburgiteicelanditepyroxenitetrachyandesitefoidoliterhyoliteobsidianscoriaWords used to describe igneous rock or igneous rock typesinclude: ultramafic, mafic, intermediate, felsic, aphanitic, porphyritic, phaneritic, extrusive, intrusive, vesicular, glassy, coarse grained, fine grained, acidic, basic.
What is the classification of rhyolite?
Felsic extrusive igneous rock. It is the volcanic equivalent of granite.
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.
