Is Granite Felsic Intermediate Or Mafic

A common mafic rock is basalt.

Is granite felsic intermediate or mafic.

Intermediate rocks are roughly even mixtures of felsic minerals mainly plagioclase and mafic minerals mainly hornblende pyroxene and or biotite. The term felsic describes igneous rocks that are relatively rich in the elements that form quartz and feldspar. Which of the following is an aphanitic igneous rock. Due to the color of the minerals forming them the rocks are either light or dark.

Gabbro and basalt are mafic with an average silica content of 48 percent. Mafic rocks have between 45 and 55 of silica whereas felsic rocks have over 65 of silica the highest of all types. It is commonly erupted as passive lava flows due to its low viscosity. More general terms for these rocks are mafic felsic and intermediate.

Diorite is the name given to intrusive intermediate rocks whereas andesite is the name given to extrusive intermediate rocks. This is an order showing increased silica content. Whereas magma mixing occurs when two ascending bodies of magma join and mix together into a composition that is intermediate to the two original magmas. Felsic rocks are composed of high levels of magma silicate materials and rocks which are also rich in potassium oxygen silicon and sodium.

Basalt is an extrusive mafic volcanic rock. Therefore rocks are divided into ultramafic mafic intermediate and felsic. Felsic intermediate mafic ultramafic. Mafic rocks have about 50 percent silica and high amounts of iron magnesium and calcium and are dark in color.

For example granite contains around 70 of silica. Mafic felsic and intermediate extrusive rocks. Granite is a felsic rock. Additionally they contain somewhat more gas than do the mafic magmas but not quite as much as the felsic magmas see below.

Part i volcanic extrusive rocks. All felsic rocks contain a high percentage of silica. Gabbro is mafic obsidian is felsic granite is felsic andesite is intermediate. It is important to note that there are many intermediate steps in the purification process and many intermediate magmas which are produced during the conversion from mafic to felsic.

And peridotite is an ultramafic rock with an. Syenite diorite and monzonite are intermediate with an average silica content of 59 percent. Felsic rocks are mostly feldspar especially k feldspar at least 10 quartz and less than 15 mafic minerals biotite hornblende. The most common felsic rock is granite which represents the purified end product of the earth s internal differentiation process.

There is little or no quartz. Compilations of many rock analyses show that rhyolite and granite are felsic with an average silica content of about 72 percent.