Granite is found in the crust primarily conditnental crust as.
Is most of the upper mantle made of granite.
Most of the minerals in the mantle are silicates meaning they contain silica.
The upper mantle of the earth is a very thick layer of rock inside the planet which begins just beneath the crust at about 10 km 6 2 mi under the oceans and about 35 km 22 mi under the continents and ends at the top of the lower mantle at 670 km 420 mi.
The cooler mantle material will there fore tend to sink while the hooter material will tend to rise.
A glassy texture is the result of lava that has cooled very slowly.
Temperatures range from approximately 200 c 392 f at the upper boundary with the crust to approximately 900 c 1 650 f at.
Rapid cooling of magma or lava results in rocks with small interconnected mineral grains.
Silica is found in the upper mantle but not granite.
Around the core is the mantle which is the thickest of the layers.
Much of upper mantle is thought to be made of granite.