- published: 23 Feb 2015
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In geology felsic refers to 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 (ferric). It refers to those rocks rich in silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
They are usually light in color and have specific gravities less than 3. The most common felsic rock is granite. Common felsic minerals include quartz, muscovite, orthoclase, and the sodium-rich plagioclase feldspars. In terms of chemistry, felsic minerals and rocks are at the other end of the elemental spectrum from the mafic minerals and rocks.
In modern usage, the term acid rock, although sometimes used as a synonym, refers to a high-silica-content (greater than 63% SiO2 by weight) volcanic rock, such as rhyolite.
The term was used more broadly in older geologic literature. It is considered archaic now, as the terms "acidic" and "basic rock" were based on an incorrect idea, dating from the 19th century, that silicic acid was the chief form of silicon occurring in rocks.
Hello, I am back after quite the hiatus. Here we're covering the terminology of felsic and mafic rock types. Have quite a few videos to be making in the following weeks, so hopefully the next one will be up in better time. ALSO used after effects for the first tim. see anything glaringly obviously horrible that I need to fix RIGHT NOW.? MORE OF MY FACE www.youtube.com/jessicasvlogging www.twitter.com/skylark20 www.instagram.com/the_skylark I also have a snapchat....for unknown reasons www.snapchat.com/jessfieldnotes
Mafic vs. Felsic u. Of oregon mafic vs. Felsic u. Of oregon jersey.Uoregon.Edu mstrick askgeoman geoquerry.Html "" " .Googleusercontent search. These are both made up words used to indicate the chemical composition of silicate minerals, magmas, and igneous rocks. The term is derived from using the ma from magnesium and the fic from the latin word for iron, but mafic magmas also are relatively enriched in calcium and sodium , in the concept of mineralogy, or geology in the much broader sense, two terms are commonly used to describe the characteristics of rocks and also lava. When used to describe the characteristics of lava, mafic lava would mean that it is runnier or more viscous as opposed to the , best answer mafic lava is less viscous(runnier) than felsic lava due to a lower silica co...
Divisions of igneous rocks based on chemical composition
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The term is derived from using the ma magnesium and fic latin word for iron, but mafic magmas also are relatively enriched in calcium sodium aug 17, 2011 as such, igneous rocks described based on their silicate minerals. This means that ultramafic is the type of rock having least silica while felsic has most silicate compound oct 22, 2016. Exemplify this color difference nicely (fig. What is the difference between felsic and mafic magma? . Felsic rocks know the difference buzzlethe between mafic, felsic and intermediate lava flows what is mafic felsic? Quora. Mafic vsmafic vsdifference between mafic and felsic difference vs youtube. Dec 8, 2006 felsic and mafic rocks, division of igneous rocks on the basis their felsic; Those with between 55 65 percent silica are intermediate; Aug 30, 2016...
This video describes the differences between mafic and felsic igneous rocks. Additionally, it explains how to differentiate between mafic and felsic on the Earth Science Reference Tables
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