FORMATION OF GRANITE 

If you were to go hiking in the Sierra Nevada Mountains, California or the Adirondack Mountains, New York, you would spend a lot of time walking on rounded hills. You would notice that the rocks are composed of minerals that you can see. It has a phaneritic texture associated with plutonic (intrusive) igneous rocks. If you examined the rock, you would see it is a mixture of light and dark minerals. The rock might also be colored reddish brown where it has been weathered.

The phaneritic texture reveals that the rock was cooled slowly, within the crust of the Earth. This texture and the light color of the rock tell you that these rocks are probably granite.

Yosemite