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- Felsic rocks are rocks that are rich in feldspar and silica, and have a low density and a light color1. Examples of felsic rocks include2345:
- Granite: a coarse-grained rock that is formed from the slow cooling of magma beneath the Earth’s surface.
- Rhyolite: a fine-grained rock that is formed from the rapid cooling of lava.
- Obsidian: a glassy rock that is formed from the rapid cooling of lava.
- Dacite: an intermediate to felsic rock that is formed from the slow cooling of magma beneath the Earth’s surface.
- Tonalite, syenite, nepheline syenite, and trachyte: intermediate to felsic rocks, depending on silica content.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Compilations of many rock analyses show that rhyolite and granite are felsic, with an average silica content of about 72 percent; syenite, diorite, and monzonite are intermediate, with an average silica content of 59 percent; gabbro and basalt are mafic, with an average silica content of 48 percent; and peridotite is an ultramafic rock, with an average of 41 percent silica.www.britannica.com/science/felsic-rockExamples of felsic rocks The common felsic rocks are granite, rhyolite, obsidian, dacite, and rhyodacite. Others like tonalite, syenite, nepheline syenite, and trachyte are intermediate to felsic, depending on silica content. These rocks may be aphanitic (fine-grained), coarse-grained, or glassy.geologybase.com/felsic-rocks/Common examples of felsic rocks include granite and rhyolite. Granite is a coarse-grained rock that is formed from the slow cooling of magma beneath the Earth’s surface, while rhyolite is a fine-grained rock that is formed from the rapid cooling of lava.thecontentauthority.com/blog/mafic-vs-felsicThe most common felsic rock is granite. Common felsic minerals include quartz, muscovite, orthoclase, and the sodium-rich plagioclase feldspars (albite -rich).en.wikipedia.org/wiki/FelsicCommon felsic rocks include granite, rhyolite, and dacite.sciencestruck.com/mafic-vs-felsic-rocks - People also ask
Felsic and mafic rocks | Igneous, Granitic & Rhyolitic Types
WEBCompilations of many rock analyses show that rhyolite and granite are felsic, with an average silica content of about 72 percent; syenite, diorite, and monzonite are intermediate, with an average silica content of 59 percent; gabbro and basalt are mafic, with an …
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Felsic - Wikipedia
In geology, felsic is a modifier 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 refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. Felsic magma or lava is higher in viscosity than mafic magma/lava, and have low temperatures to keep the felsic minerals molten.
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Igneous Rocks - Types, Properties, and Examples
WEBJan 31, 2024 · 1. Felsic Igneous Rocks. Definition: Felsic rocks are rich in silica (over 65%) and contain a high proportion of lighter minerals like quartz and feldspar. The term …
Felsic Rock Composition and Examples | Geology Base
WEBDec 10, 2023 · Examples of felsic rocks. The common felsic rocks are granite, rhyolite, obsidian, dacite, and rhyodacite. Others like tonalite, syenite, nepheline syenite, and …
Felsic | Definition, Composition & Examples - Lesson | Study.com
WEBNov 21, 2023 · What is an example of a felsic rock? An example of a felsic rock is granite. Granite is an intrusive igneous rock that forms out of the slow crystallization of felsic …
4.1: Classification of Igneous Rocks - Geosciences LibreTexts
WEBFor igneous rock, the composition is divided into four groups: felsic, intermediate, mafic, and ultramafic. These groups refer to differing amounts of silica, iron, and magnesium …
4.3 Classification of Igneous Rocks – Principles of …
WEBFor example, a felsic intrusive rock is called granite, whereas a felsic extrusive rock is called rhyolite. Granite and rhyolite have the same mineral composition, but their grain size gives each a distinct appearance.
4.1: Igneous Rocks - Geosciences LibreTexts
WEBThe mineral compositions of igneous rocks are usually described as being felsic, intermediate, mafic, or ultramafic (as examples, see Figure 4.7 and Figure 4.8). Felsic rocks are made of light-colored, low-density …
7.3: Classification of Igneous Rocks - Geosciences LibreTexts
WEBApr 24, 2024 · A felsic intrusive rock is called granite, whereas a felsic extrusive rock is called rhyolite. Granite and rhyolite have the same mineral composition, but their grain …
Felsic Rock - an overview | ScienceDirect Topics
WEBFelsic rocks in the western part of the panel are predominantly andesitic in composition (sample G91/73; Table 20.1) and massive to layered. They contain rare examples of …
Igneous rock - Minerals, Magma, Crystals | Britannica
WEBFor example, it is common to find a felsic rock composed almost entirely of the mineral plagioclase, but in chemical terms, such a rock is a subsilicic mafic rock. Another …
Felsic Rock - HyperPhysics
WEBThe class of rock which crystallizes from silicate minerals at relatively low temperatures and with relatively high percentage of silica is generally referred to as "felsic" rock. This …
Igneous Rocks: textures and compositions - Cosumnes River …
WEBFeb 23, 2005 · I. Igneous rocks are rocks that form from the cooling of hot, liquid melt. This melt is generically called magma. A. Melts that erupt at the surface of the Earth and cool …
Felsic and Mafic Rock and Mineral Differences | Geology Base
WEBDec 12, 2023 · Felsic rocks are light-colored rocks high in silica and felsic minerals and low in mafic minerals. Due to their high silica content, which is > 63 wt. %, these rocks are …
5.3: Igneous Rock Classification - Geosciences LibreTexts
WEBApr 11, 2024 · Igneous rock composition is divided into four categories: ultramafic, mafic, intermediate and felsic. These categories refer to differing amounts of silica, potassium, …
25 How Are Igneous Rocks Classified? - City University of New York
WEBGranite, the most well known example of an intrusive igneous rock, has a phaneritic texture. See image of granite surface below. Granite is made of four minerals, all visible …
Igneous Rocks - National Geographic Society
WEBOct 19, 2023 · Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. …
How to Classify Igneous Rocks Into (Ultramafic, Mafic, …
WEBMafic rocks are produced in a variety of plate tectonic settings (divergent plate boundaries such as mid-ocean ridges, continental rifts such as our own Basin and Range Province …
3.6: Igneous Rocks - Geosciences LibreTexts
WEBFor example, a coarse-grained, felsic igneous rock is not only a granite, it is an intrusive igneous rock that formed from slow cooling and crystallization of a body of magma …
Mafic Vs. Felsic Rocks: Know the Difference - Science Struck
WEBMafic Vs. Felsic Rocks: Know the Difference. Classification of rocks, minerals, and magma based on the silica content present in them defines them as either mafic or felsic. Learn …
Intermediate Rock Composition and Examples | Geology Base
WEBDec 12, 2023 · Intermediate igneous rocks are medium in silica (52-63 wt.%) and have nearly equal amounts of felsic and mafic minerals. Examples are andesite and diorite. …
Archean felsic volcanic rocks - Wikipedia
WEBArchean felsic volcanic rocks are felsic volcanic rocks that were formed in the Archean Eon (4 to 2.5 billion years ago). [2] . The term "felsic" means that the rocks have silica …
4.3: Igneous Rocks - Geosciences LibreTexts
WEBApr 24, 2024 · A felsic, vesicular (extrusive) igneous rock. Pumice forms when felsic lava, which can contain significantly higher amounts of volatile gases, very rapidly cools. As …
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