Felsic rocks 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 (albite -rich).

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 ...

The most common igneous compositions can be summarized in three words: mafic (basaltic), intermediate (andesitic), and felsic (granitic). Felsic composition is higher in silica (SiO 2 ) and low in iron (Fe) and magnesium (Mg).

The most common igneous compositions can be summarized in three words: mafic (basaltic), intermediate (andesitic), and felsic (granitic). Felsic composition is higher in silica (SiO 2 ) and low in iron (Fe) and magnesium (Mg).

The most common igneous compositions can be summarized in three words: mafic (basaltic), intermediate (andesitic), and felsic (granitic). Felsic composition is higher in silica (SiO 2) and low in iron (Fe) and magnesium (Mg). Mafic composition is higher in …

2023年11月21日 · 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 magma within Earth's...

Felsic rocks typically contain over 65% silica, making them significantly lighter than mafic rocks. Common examples of felsic rocks include granite and rhyolite, which are often found in continental regions.

These two granites illustrate the color variations common to granites. The dark pink granite on the left is dominated by K-feldspars that happen to be pink. The white granite on the right has white K-feldspars. Both share a speckled appearance stemming from their coarse-grained textures.

2024年8月30日 · Felsic rocks, such as granite, are mostly coarse-grained, indicating slow cooling of magma beneath the Earth's surface. They are primarily found in the continental crust and play a significant role in tectonic processes and geological formation.

The 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 class includes granite and rhyolite and is at the low temperature extreme of the Bowen reaction series .